articles that compared the pros and cons of different pandemic policies. Then, in mid-May, his social media Weibo account was suspended.

Jack Ma, the founder of the e-commerce behemoth Alibaba, largely disappeared from public view after he criticized banking regulators in late 2019. The regulators quashed the initial public offering of Ant Group, the tech and financial company controlled by Mr. Ma, and fined Alibaba a record $2.8 billion last year.

Ren Zhiqiang, a retired real estate developer, was sentenced to 18 years in prison on charges of committing graft, taking bribes, misusing public funds and abusing his power. His real crime, his supporters say, was criticizing Mr. Xi’s handling of the coronavirus outbreak in early 2020.

Mr. Zhou, 49, is known as a maverick in Chinese business circles. He founded his first business in stereo systems with his brother in the mid-1990s when he was still in college. In 2010, he started Yongche, one of the first ride-hailing companies.

Unlike most Chinese bosses, he didn’t demand that his employees work overtime, and he didn’t like liquor-filled business meals. He turned down hundreds of millions of dollars in funding and refused to participate in subsidy wars because doing so didn’t make economic sense. He ended up losing out to his more aggressive competitor Didi.

He later wrote a best seller about his failure and became a partner at a venture capital firm in Beijing. In April, he was named chairman of the ride-sharing company Caocao, a subsidiary of auto manufacturing giant Geely Auto Group.

A Chinese citizen with his family in Canada, Mr. Zhou said in an interview that in the past many wealthy Chinese people like him would move their families and some of their assets abroad but work in China because there were more opportunities.

Now, some of the top talent are trying to move their businesses out of the country, too. It doesn’t bode well for China’s future, he said.

“Entrepreneurs have good survivor’s instinct,” he said. “Now they’re forced to look beyond China.” He coined a term — “passive globalization” — based on his discussions with other entrepreneurs. “Many of us are starting to take such actions,” he said.

The prospect depressed him. China used to be the best market in the world: big, vibrant, full of ambitious entrepreneurs and hungry workers, he said, but the senseless and destructive zero Covid policy and the business crackdowns have forced many of them to think twice.

“Even if your company is a so-called giant, we’re all nobodies in front of the bigger force,” he said. “A whiff of wind could crush us.”

All the business leaders I spoke to said they were reluctant to make long-term investment in China and fearful that they and their companies could become the next victim of the government’s iron fist. They’re focusing on their international operations if they have them or seeking opportunities abroad.

Mr. Zhou left for Vancouver, British Columbia, in a hurry in late April when Beijing was locking down many neighborhoods. Then he wrote the article, urging his peers to try to speak up and change their powerless status.

He said he understood the fear and the pressure they faced. “Honestly speaking, I’m scared, too.” But he would probably regret it more if he did nothing. “Our country can’t go on like this,” he said. “We can’t allow it to deteriorate like this.”

In recent years, a few of Mr. Zhou’s articles and social media accounts have been deleted. His outspokenness has caused uneasiness among his friends, he said. Some have told him to shut up because it didn’t change anything and was creating unnecessary risks for himself, his family, his companies and the stakeholders in his businesses.

But Mr. Zhou can’t help himself. He’s worried that China could become more like it was under Mao: impoverished and repressive. His generation of entrepreneurs owes much of their success to China’s reform and opening up policies, he said. They have the responsibilities to initiate change instead of waiting for a free ride.

Maybe they can start by speaking up, even if just a little bit.

“Any change starts with disagreement and disobedience,” he said.

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Why You Might Not Be Returning to the Office Until Next Year

Postponing gives the workers who are responding to new requirements sufficient time to become fully vaccinated. And it gives companies more time to set up the logistics that accompany vaccination mandates, such as processes for tracking vaccination status and, soon, who has received a booster.

“Within a company, a C.E.O. can say: ‘Our company, our culture, our business. We need to be together, we need to be in the office, this is the date,’” said Mary Kay O’Neill, a senior health consultant at Mercer Consulting Group. “And then our friends in H.R. are like, ‘How are we going to do that?’”

For some organizations, negotiations with unions are also a factor. A spokeswoman for NPR, which has not set a date for returning to the office, said the public radio network was working “with key stakeholders, including our unions, to evaluate the best approaches to keeping our staff safe and maintaining our operations.”

With new logistics around vaccine mandates, continued uncertainty around variants, and increasingly vocal employee demands, some companies, including The New York Times and American Airlines, have opted out of setting return dates.

The agility of technology companies, alongside industries like consulting and media, is in many ways unique. CVS Health is still eyeing a fall return, albeit with a degree of flexibility worked in. And many employees never went home at all — with a good portion of workers at companies like General Motors, Ford Motor and Chevron having worked on-site throughout most of the pandemic.

Many companies that did send employees home remain eager to bring them back. The longer workers stay out of the office, the harder it may be to cajole their return. And real estate costs are difficult to justify if offices are left empty.

In finance, which traditionally puts a priority on in-person apprenticeship and hustling, the prominent firms have made being in the office a recruiting tool. Goldman Sachs brought back its employees in June and JPMorgan Chase in July. The rise of the Delta variant didn’t slow those plans down, but it did seemingly expedite measures to prevent the spread of the virus. Goldman said last month that it would require anyone who entered its U.S. offices, including clients, to be fully vaccinated.

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They Relied on Chinese Vaccines. Now They’re Battling Outbreaks.

The reason for the surge in Mongolia, Mr. Batbayar said, is that the country reopened too quickly, and many people believed they were protected after only one dose.

“I think you could say Mongolians celebrated too early,” he said. “My advice is the celebrations should start after the full vaccinations, so this is the lesson learned. There was too much confidence.”

Some health officials and scientists are less confident.

Nikolai Petrovsky, a professor at the College of Medicine and Public Health at Flinders University in Australia, said that with all of the evidence, it would be reasonable to assume the Sinopharm vaccine had minimal effect on curbing transmission. A major risk with the Chinese inoculation is that vaccinated people may have few or no symptoms and still spread the virus to others, he said.

“I think that this complexity has been lost on most decision makers around the world.”

In Indonesia, where a new variant is spreading, more than 350 doctors and health care workers recently came down with Covid-19 despite being fully vaccinated with Sinovac, according to the risk mitigation team of the Indonesian Medical Association. Across the country, 61 doctors died between February and June 7. Ten of them had taken the Chinese-made vaccine, the association said.

The numbers were enough to make Kenneth Mak, Singapore’s director of medical services, question the use of Sinovac. “It’s not a problem associated with Pfizer,” Mr. Mak said at a news conference on Friday. “This is actually a problem associated with the Sinovac vaccine.”

Bahrain and the United Arab Emirates were the first two countries to approve the Sinopharm shot, even before late-stage clinical trial data was released. Since then, there have been extensive reports of vaccinated people falling ill in both countries. In a statement, the Bahraini government’s media office said the kingdom’s vaccine rollout had been “efficient and successful to date.”

Still, last month officials from Bahrain and the United Arab Emirates announced that they would offer a third booster shot. The choices: Pfizer or more Sinopharm.

Reporting was contributed by Khaliun Bayartsogt, Andrea Kannapell, Ben Hubbard, Asmaa al-Omar and Muktita Suhartono. Elsie Chen and Claire Fu contributed research.

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Covid Pandemic Demands Air Quality Changes in the Workplace, Researchers Say

Clean water in 1842, food safety in 1906, a ban on lead-based paint in 1971. These sweeping public health reforms transformed not just our environment but expectations for what governments can do.

Now it’s time to do the same for indoor air quality, according to a group of 39 scientists. In a manifesto of sorts published on Thursday in the journal Science, the researchers called for a “paradigm shift” in how citizens and government officials think about the quality of the air we breathe indoors.

The timing of the scientists’ call to action coincides with the nation’s large-scale reopening as coronavirus cases steeply decline: Americans are anxiously facing a return to offices, schools, restaurants and theaters — exactly the type of crowded indoor spaces in which the coronavirus is thought to thrive.

There is little doubt now that the coronavirus can linger in the air indoors, floating far beyond the recommended six feet of distance, the experts declared. The accumulating research puts the onus on policymakers and building engineers to provide clean air in public buildings and to minimize the risk of respiratory infections, they said.

new workplace standards for air quality, but the scientists maintained that the remedies do not have to be onerous. Air quality in buildings can be improved with a few simple fixes, they said: adding filters to existing ventilation systems, using portable air cleaners and ultraviolet lights — or even just opening the windows where possible.

Dr. Morawska led a group of 239 scientists who last year called on the World Health Organization to acknowledge that the coronavirus can spread in tiny droplets, or aerosols, that drift through the air. The W.H.O. had insisted that the virus spreads only in larger, heavier droplets and by touching contaminated surfaces, contradicting its own 2014 rule to assume all new viruses are airborne.

The W.H.O. conceded on July 9 that transmission of the virus by aerosols could be responsible for “outbreaks of Covid-19 reported in some closed settings, such as restaurants, nightclubs, places of worship or places of work where people may be shouting, talking or singing,” but only at short range.

detailed 10 lines of evidence that support the importance of airborne transmission indoors.

On April 30, the W.H.O. inched forward and allowed that in poorly ventilated spaces, aerosols “may remain suspended in the air or travel farther than 1 meter (long-range).” The Centers for Disease Control and Prevention, which had also been slow to update its guidelines, recognized last week that the virus can be inhaled indoors, even when a person is more than six feet away from an infected individual.

“They have ended up in a much better, more scientifically defensible place,” said Linsey Marr, an expert in airborne viruses at Virginia Tech, and a signatory to the letter.

“It would be helpful if they were to undertake a public service messaging campaign to publicize this change more broadly,” especially in parts of the world where the virus is surging, she said. For example, in some East Asian countries, stacked toilet systems could transport the virus between floors of a multistory building, she noted.

More research is also needed on how the virus moves indoors. Researchers at the Department of Energy’s Pacific Northwest National Laboratory modeled the flow of aerosol-size particles after a person has had a five-minute coughing bout in one room of a three-room office with a central ventilation system. Clean outdoor air and air filters both cut down the flow of particles in that room, the scientists reported in April.

But rapid air exchanges — more than 12 in an hour — can propel particles into connected rooms, much as secondhand smoke can waft into lower levels or nearby rooms.

guidance for Covid does not require improvements to ventilation, except for health care settings.

“Ventilation is really built into the approach that OSHA takes to all airborne hazards,” said Peg Seminario, who served as director of occupational safety and health for the A.F.L.-C.I.O. from 1990 until her retirement in 2019. “With Covid being recognized as an airborne hazard, those approaches should apply.”

In January, President Biden directed OSHA to issue emergency temporary guidelines for Covid by March 15. But OSHA missed the deadline: Its draft is reportedly being reviewed by the White House’s regulatory office.

only during medical procedures known to produce aerosols, or if they have close contact with an infected patient. Those are the same guidelines the W.H.O. and the C.D.C. offered early in the pandemic. Face masks and plexiglass barriers would protect the rest, the association said in March in a statement to the House Committee on Education and Labor.

“They’re still stuck in the old paradigm, they have not accepted the fact that talking and coughing often generate more aerosols than do these so-called aerosol-generating procedures,” Dr. Marr said of the hospital group.

increase the risk, perhaps because they inhibit proper airflow in a room.

The improvements do not have to be expensive: In-room air filters are reasonably priced at less than 50 cents per square foot, although a shortage of supply has raised prices, said William Bahnfleth, professor of architectural engineering at Penn State University, and head of the Epidemic Task Force at Ashrae (the American Society of Heating, Refrigerating and Air-Conditioning Engineers), which sets standards for such devices. UV lights that are incorporated into a building’s ventilation system can cost up to roughly $1 per square foot; those installed room by room perform better but could be 10 times as expensive, he said.

If OSHA rules do change, demand could inspire innovation and slash prices. There is precedent to believe that may happen, according to David Michaels, a professor at George Washington University who served as OSHA director under President Barack Obama.

When OSHA moved to control exposure to a carcinogen called vinyl chloride, the building block of vinyl, the plastics industry warned it would threaten 2.1 million jobs. In fact, within months, companies “actually saved money and not a single job was lost,” Dr. Michaels recalled.

In any case, absent employees and health care costs can prove to be more costly than updates to ventilation systems, the experts said. Better ventilation will help thwart not just the coronavirus, but other respiratory viruses that cause influenza and common colds, as well as pollutants.

Before people realized the importance of clean water, cholera and other waterborne pathogens claimed millions of lives worldwide every year.

“We live with colds and flus and just accept them as a way of life,” Dr. Marr said. “Maybe we don’t really have to.”

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Seychelles Sees Rise in Coronavirus Cases Despite Vaccinations

Marie Neige, a call center operator in Seychelles, was eager to be vaccinated. Like the majority of the residents in the tiny island nation, she was offered China’s Sinopharm vaccine in March, and was looking forward to the idea of being fully protected in a few weeks.

On Sunday, she tested positive for the coronavirus.

“I was shocked,” said Ms. Neige, 30, who is isolating at home. She said she has lost her sense of smell and taste and has a slightly sore throat. “The vaccine was supposed to protect us — not from the virus, but the symptoms,” she said. “I was taking precaution after precaution.”

China expected its Sinopharm vaccines to be the linchpin of the country’s vaccine diplomacy program — an easily transported dose that would protect not just Chinese citizens but also much of the developing world. In a bid to win good will, China has donated 13.3 million Sinopharm doses to other countries, according to Bridge Beijing, a consultancy that tracks China’s impact on global health.

Instead, the company, which has made two varieties of coronavirus vaccines, is facing mounting questions about the inoculations. First, there was the lack of transparency with its late-stage trial data. Now, Seychelles, the world’s most vaccinated nation, has had a surge in cases despite much of its population being inoculated with Sinopharm.

has managed to beat back the virus. A study has shown that the Pfizer vaccine that Israel used is 94 percent effective at preventing transmission. On Wednesday, the number of daily new confirmed Covid-19 cases per million people in Seychelles stood at 2,613.38, compared to 5.55 in Israel, according to The World In Data project.

Wavel Ramkalawan, the president of Seychelles, defended the country’s vaccination program, saying that the Sinopharm and AstraZeneca vaccines have “served our population very well.” He pointed out that the Sinopharm vaccine was given to people age 18 to 60, and in this age group over all, 80 percent of the patients who needed to be hospitalized were not vaccinated.

according to the Seychelles News Agency. Sinopharm did not respond to a request for comment.

an article from The Wall Street Journal on Seychelles, a spokeswoman for China’s foreign ministry blamed Western media for trying to discredit Chinese vaccines and “harboring the mentality that ‘everything involving China has to be smeared.’”

In a news conference, Kate O’Brien, director of immunizations at the World Health Organization, said the agency is evaluating the surge of infections in Seychelles and called the situation “complicated.” Last week, the global health group approved the Sinopharm vaccine for emergency use, raising hopes of an end to a global supply crunch.

She said that “some of the cases that are being reported are occurring either soon after a single dose or soon after a second dose or between the first and second doses.”

According to Ms. O’Brien, the W.H.O. is looking into the strains that are currently circulating in the country, when the cases occurred relative to when somebody received doses and the severity of each case. “Only by doing that kind of evaluation can we make an assessment of whether or not these are vaccine failures,” she said.

But some scientists say it is increasingly clear that the Sinopharm vaccine does not offer a clear path toward herd immunity, particularly when considering the multiple variants appearing around the world.

Governments using the Sinopharm vaccine “have to assume a significant failure rate and have to plan accordingly,” said John Moore, a vaccine expert at Cornell University. “You have to alert the public that you will still have a decent chance of getting infected.”

Many in Seychelles say the government has not been forthcoming.

“My question is: Why did they push everyone to take it?” said Diana Lucas, a 27-year-old waitress who tested positive on May 10. She said she received her second dose of the Sinopharm vaccine on Feb. 10.

Emmanuelle Hoareau, 22, a government lawyer, tested positive on May 6 after getting the second dose of the Sinopharm vaccine in March. “It doesn’t make sense,” she said. She said the government had failed to give the public enough information about the vaccines.

“They are not explaining to the people about the real situation,” she said. “It’s a big deal — a lot of people are getting infected.”

Ms. Hoareau’s mother, Jacqueline Pillay, is a nurse in a private clinic in Victoria, the capital. She said she believes there is a new variant in Seychelles because of an influx of foreigners who have arrived in recent months. The tourism-dependent country opened its borders on March 25 to most travelers without any quarantine.

“People are very scared now,” said Ms. Pillay, 58. “When you give people the right information, then people would not speculate.”

Health officials have recently appeared on television to encourage those who have only taken the first dose of the Sinopharm vaccine to return for the second shot. But Ms. Pillay said she is frustrated that the public health commissioner has not addressed why the vaccines don’t appear to be working as well as they should.

“I think a lot of people aren’t coming back,” said Ms. Pillay.

Marietta Labrosse, Elsie Chen and Claire Fu contributed research.

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As Outbreak Rages, India Orders Critical Social Media Posts to Be Taken Down

NEW DELHI — With a devastating second wave of Covid-19 sweeping across India and lifesaving supplemental oxygen in short supply, India’s government on Sunday said it ordered Facebook, Instagram and Twitter to take down dozens of social media posts critical of its handling of the pandemic.

The order was aimed at roughly 100 posts that included critiques from opposition politicians and calls for Narendra Modi, India’s prime minister, to resign. The government said that the posts could incite panic, used images out of context, and could hinder its response to the pandemic.

The companies complied with the requests for now, in part by making the posts invisible to those using the sites inside India. In the past, the companies have reposted some content after determining that it didn’t break the law.

The takedown orders come as India’s public health crisis spirals into a political one, and set the stage for a widening struggle between American social media platforms and Mr. Modi’s government over who decides what can be said online.

are probably much higher. The country now accounts for almost half of all new cases globally. Its health system appears to be teetering. Hospitals across the country have scrambled to get enough oxygen for patients.

In New Delhi, the capital, hospitals this weekend turned away patients after running out of oxygen and beds. Last week, at least 22 patients were killed in a hospital in the city of Nashik, after a leak cut off their oxygen supplies.

Online photos of bodies on plywood hospital beds and the countless fires of overworked crematories have gone viral. Desperate patients and their families have pleaded online for help from the government, horrifying an international audience.

On Sunday evening, in one of many pleas for help on social media, Ajay Koli took to Twitter to find an oxygen cylinder in Delhi for his mother, who, he said, had tested positive 10 days ago. Mr. Koli said he lost his father on Saturday. “I don’t want to lose my mom now.”

risks of loosening restrictions, after he held large political rallies with little regard for social distancing. Some of the content now offline in India highlighted that contradiction, using lurid images to contrast Mr. Modi’s rallies with the flames of funeral pyres.

deepen a conflict between American social media platforms and Mr. Modi’s government. The two sides have tussled in recent months over a push by India’s government to more strictly police what is said online, a policy that critics say is being used to silence government detractors.

“This has been a trend, which is enforced with increasing frequency and severity for online media spaces,” said Apar Gupta, the executive director of the Internet Freedom Foundation, a digital rights group. He added that the orders were being used to “cause censorship” under the guise of making social media companies more “accountable.”

broader conflict playing out globally. Governments across the world have been seeking to rein in the power of the largest tech companies, like Twitter and Facebook, whose policies have huge political impact far from their California headquarters. In the best of cases, it can be difficult to disentangle government efforts to tamp down misinformation from other motivations, like tilting online debate in one political party’s favor.

While the companies seek to hew to policies that they say are based on the principles of free speech, their responses to government power plays have been inconsistent and often based on business pragmatism. In Myanmar, Facebook cut business ties with military-linked accounts over violence against protesters. In China, Facebook does brisk business with state-backed media groups that have been busy denying the widespread internment of ethnic minorities, which the United States has labeled a genocide.

increasingly aggressive at stifling dissent. It has arrested activists and journalists, and pressured media organizations to hew to its line. It has cut off mobile internet access in troubled areas. After a standoff with China, it blocked a number of apps owned by Chinese companies.

In February, Twitter relented in the face of government threats to arrest its employees, and blocked 500 accounts after the government accused them of making inflammatory remarks about Mr. Modi. Twitter declined, however, to remove a number of journalists’ and politicians’ accounts, pointing out that the orders to block them did not appear to be consistent with Indian law.

In a Sunday statement, India’s government said the posts it targeted “spread fake or misleading information” and created “panic about the Covid-19 situation in India by using unrelated, old and out of the context images or visuals.” It pointed to photos in several posts that it said were of bodies unrelated to the recent outbreak.

wrote Mahua Moitra, a politician and member of parliament from West Bengal.

Aftab Alam, a professor at the University of Delhi was more direct.

“Because you know it’s easier to take down tweets than it is to ensure oxygen supplies,” he wrote on Twitter.

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India Sets Covid-19 Daily Case Record

Marking a grave new milestone in the coronavirus pandemic, India recorded 312,731 new infections in a 24-hour period, the Indian health ministry said on Thursday. It is the highest daily case count in a single country since the virus surfaced in China more than a year ago.

India’s total eclipsed the previous single-day high of 300,669 cases, set in the United States on Jan. 8, according to a New York Times database.

Over the past two months, the outbreak in India has exploded, with reports of superspreader gatherings, oxygen shortages and ambulances lined up outside hospitals because there are no ventilators for new patients.

As cases worldwide reach new weekly records, 40 percent of the infections are coming from India, a sobering reminder that the pandemic is far from over, even as infections decline and vaccinations speed ahead in the United States and other wealthy parts of the world. India has surpassed 15.6 million total infections, second most after the United States.

at least 22 people died in an accident in the central city of Nashik when a leak in a hospital’s main oxygen tank cut the flow of oxygen to Covid-19 patients.

The picture is staggeringly different from early February, when India was recording an average of just 11,000 cases a day, and domestic drug companies were pumping out millions of vaccine doses. More than 132 million Indians have received at least one dose, but supplies are running low and experts warn that the country is unlikely to meet its goal of inoculating 300 million people by the summer.

Critics say Prime Minister Narendra Modi, who imposed a harsh nationwide lockdown in March 2020 in the early stages of the pandemic, failed to prepare for a second wave or to warn Indians to remain vigilant against the virus, especially as more infectious variants began to spread.

Mr. Modi’s Hindu nationalist government has also allowed a massive Hindu festival to take place, drawing millions of pilgrims to the banks of the Ganges River, and his party has held jam-packed political rallies in several states.

wrote in The New York Times on Tuesday.

The hardest hit region is Maharashtra, a populous western state that includes the financial hub of Mumbai. On Wednesday, the state’s top leader ordered government offices to operate at 15 percent capacity and imposed new restrictions on weddings and private transportation to slow the spread of the virus.

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Accident at Covid Hospital in India Kills at Least 22 as Cases Surge

NEW DELHI — India’s health care system shows signs of buckling under the strain of a second wave of coronavirus infections, as the authorities reported nearly 300,000 new cases on Wednesday and an accident at a Covid-19 hospital killed more than 20 people.

The accident happened at a hospital in the western state of Maharashtra after a leak in the hospital’s main oxygen tank stopped the flow of oxygen to dozens of critically ill people. Televised images showed family members wailing in the wards and nurses frantically pounding on the chests of some patients.

All week, hospitals across India have been warning about an acute oxygen shortage. Many hospital officials said they were just a few hours away from running out.

“Nobody imagined this would happen,” said Subhash Salunke, a medical adviser to the Maharashtra government.

recent political rallies held by Mr. Modi that have drawn thousands, as well as the government’s decision to allow an enormous Hindu festival to continue despite signs that it has become a superspreader event. A few days ago, Mr. Modi indicated that he wanted Hindu worshipers to stay away from this year’s festival, called the Kumbh Mela, which is held on the banks of the Ganges river considered sacred by many Hindus.

But the worshipers keep coming — 70,000 showed up on Wednesday for a holy dip, bringing the total to more than 10 million since the festival began in January — and government officials on the ground are doing little to stop them.

Event organizers said that worshipers were required to produce a negative coronavirus test result or be tested on the spot, but they also acknowledged that with such huge crowds, some participants could have slipped in without being tested. Photographs show a sea of worshipers packed together in the gray waters of the river, many without masks. More than 1,000 tested positive at the site in just 48 hours, according to reports by the Indian news media.

Hindu-first worldview, is giving preferential treatment to Hindus.

“It is a clear example of double standards,” said Khalid Rasheed, chairman of the Islamic Center of India, a nonprofit religious organization.

He compared the government’s apparent endorsement of the Kumbh to the way it handled a much smaller gathering of a few thousand Islamic preachers in New Delhi last March. Not only was the seminary that hosted it shut down, but hundreds of people were also detained. Officials from Mr. Modi’s party blamed the seminary for spreading the virus.

an anti-Muslim campaign across India in which Muslims were attacked with cricket bats and run out of their neighborhoods. Many of the Muslims arrested at the seminary a year ago are still awaiting trial.

Government officials have defended the Kumbh festival as safe even as the virus infects some of its most high-profile attendees, including the former king of Nepal and his wife.

Another visitor who was infected is Tirath Singh Rawat, the chief minister of Uttarakhand, which as the state hosting this year’s festival stands to make millions in revenue from the pilgrims and vendors. Mr. Rawat mingled freely in the crowds without a mask, and told those who questioned him that “faith in God will overcome the fear of the virus.”

Shailesh Bagauli, a state official, said the timing of the festival had been determined by “optimal astrological conditions” and that the government had implemented measures like mask wearing and social distancing.

On Wednesday, news of the hospital oxygen leak quickly spread around the country, raising fears that the health care system here, which is chronically underfunded, was about to collapse.

Indian news channels showed images of the oxygen leak at Zakir Hussain Hospital in the city of Nashik.

“When we reached the spot, it was all foggy,” said S.K. Bairagi, a fire chief in the city. He said it took about 30 minutes to repair the tank.

The dwindling oxygen supply is becoming one of the most alarming aspects of India’s second wave. To expedite its delivery to hospitals, India’s railway service has begun running what it calls “oxygen express” trains across the country.

India’s health ministry has said that the daily demand for oxygen at hospitals has reached about 60 percent of the country’s daily production capacity of just over 7,000 metric tons. Government officials countered news reports this week that said India had increased oxygen exports as the second wave of infections was approaching, saying those exports amounted to less than 1 percent of daily production capacity.

But the health ministry also said that it was looking to import 50,000 metric tons of medical oxygen from abroad, a sign that India’s government may be concerned about the domestic supply.

On Tuesday night, more than a dozen hospitals in New Delhi, the capital, put out an alert saying they were hours away from running out of oxygen.

In Lucknow, another major city in northern India, the Mayo Medical Center warned on Wednesday that it was down to a 15-minute backup supply and that “oxygen is not available anywhere in Lucknow.”

Later in the day, hospital officials said they had received 40 oxygen cylinders. But medical experts said that with so many people falling sick, it was a dangerous time to be running low.

“There is definitely an oxygen shortage across the country,” said Shashank Joshi, an endocrinologist and member of the Covid task force in Maharashtra. “The situation is grim.”

Mujib Mashal contributed reporting from New Delhi, andBhadra Sharma from Kathmandu, Nepal.

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China’s Dr. Fauci, Dr. Zhang Wenhong, Urges Restraint in Fighting Covid-19

China has imposed some of the toughest lockdowns in the world to stop Covid-19. One city sealed apartment doors, leaving residents with dwindling food and medicine. One village tied a local to a tree after he left home to buy cigarettes. Beijing forced people to leave their pets behind when they went into quarantine.

Few officials spoke up against the excesses, given the central government’s obsession with its anti-coronavirus campaign. That hasn’t stopped Dr. Zhang Wenhong.

Dr. Zhang, an infectious-disease specialist and perhaps China’s most trusted voice on Covid-19, has spoken out publicly against excessive lockdowns, though he hasn’t criticized individual cities. Fighting the pandemic, he likes to say, is like “catching mice in a china shop.”

“We hope that our pandemic prevention measures won’t affect public life too much,” Dr. Zhang wrote on Jan. 24, after a second wave of infections prompted tough clampdowns.

video a few days later, “life would be too hard.”

Dr. Zhang may be China’s closest analogue to Dr. Anthony S. Fauci, the American infectious-disease specialist who became the public face of stopping the coronavirus amid the chaos of the Trump administration. A consummate technocrat, Dr. Zhang comes across as neither political nor ideological. Yet, by offering his expert opinions straight, he pushes back against the authoritarian instinct in a system that often overreacts with draconian measures.

A top academic at Fudan University in Shanghai and a member of the Communist Party, Dr. Zhang led Shanghai’s expert panel on Covid-19, giving him considerable authority over the city’s response.

propaganda, conspiracy theories and crude nationalism.

viewed more than 860 million times on his department’s official WeChat account alone.

Maintaining a high profile in China often requires discretion. Late last year, Jack Ma, the technology billionaire, publicly criticized regulators. The authorities quickly swooped down on his business empire.

Dr. Zhang doesn’t challenge the government, but neither does he always toe the official line. Late last year, some Chinese officials pointed to findings that the virus had been found on the packaging of imported food, suggesting that the coronavirus may have been brought to China from overseas. Dr. Zhang has told his audience not to worry about it: “The chance of catching the virus from imported goods,” he said, “is lower than dying in a plane crash.”

“I’m not going to hide the information because I’m worried that I could say something wrong and cause some controversies,” he said over the summer. “We always share what we know.”

responded that protein helps build the immune system.

Still, he has kept a high profile without drawing major ire from the government or sustained criticism from the nationalists. Some of that stems from China’s pride in quickly containing the coronavirus. Dr. Zhang, who played a role in that, has won a number of awards from official groups.

In watching his speeches, I found another key to his sustained appeal. In his impromptu speech at a national teaching award ceremony in September, he said the essence of education is acknowledging human dignity. Mr. Zhang appeals to the humanity of his audience and, by admitting his own foibles, shows the authorities and the public that he is merely human, too.

In one speech, he mentioned that some victims of avian flu had caught it from taking care of their infected loved ones, and that female patients were more likely to infect their doting mothers than their absent husbands. “At that moment,” he told the audience, “I lost faith in romantic love.”

said, “I would have worked on my deltoid.”

interview last June, a reporter asked him whether anybody had reminded him to be mindful of his status as an expert and the head of an expert government panel.

“People are smart,” he responded. “They know whether you’re telling them truth or lies.”

When he gets public accolades, he often uses the occasion to highlight his causes, like more funding for infectious-disease research and for increasing the public awareness of tuberculosis and hepatitis B, two of the most common infectious diseases in China.

He also talks about people who deserved more attention, like the women among the pandemic responders whose role has often taken a back seat to the men’s in the media. “Men are on camera more,” he said at a forum on the subject, “but women did more work.”

Then he turned to the female medical workers, and bowed.

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China’s Dr. Fauci Urges Restraint in Fighting Covid-19

China has imposed some of the toughest lockdowns in the world to stop Covid-19. One city sealed apartment doors, leaving residents with dwindling food and medicine. One village tied a local to a tree after he left home to buy cigarettes. Beijing forced people to leave their pets behind when they went into quarantine.

Few officials spoke up against the excesses, given the central government’s obsession with its anti-coronavirus campaign. That hasn’t stopped Dr. Zhang Wenhong.

Dr. Zhang, an infectious-disease specialist and perhaps China’s most trusted voice on Covid-19, has spoken out publicly against excessive lockdowns, though he hasn’t criticized individual cities. Fighting the pandemic, he likes to say, is like “catching mice in a china shop.”

“We hope that our pandemic prevention measures won’t affect public life too much,” Dr. Zhang wrote on Jan. 24, after a second wave of infections prompted tough clampdowns.

video a few days later, “life would be too hard.”

Dr. Zhang may be China’s closest analogue to Dr. Anthony S. Fauci, the American infectious-disease specialist who became the public face of stopping the coronavirus amid the chaos of the Trump administration. A consummate technocrat, Dr. Zhang comes across as neither political nor ideological. Yet, by offering his expert opinions straight, he pushes back against the authoritarian instinct in a system that often overreacts with draconian measures.

A top academic at Fudan University in Shanghai and a member of the Communist Party, Dr. Zhang led Shanghai’s expert panel on Covid-19, giving him considerable authority over the city’s response.

propaganda, conspiracy theories and crude nationalism.

viewed more than 860 million times on his department’s official WeChat account alone.

Maintaining a high profile in China often requires discretion. Late last year, Jack Ma, the technology billionaire, publicly criticized regulators. The authorities quickly swooped down on his business empire.

Dr. Zhang doesn’t challenge the government, but neither does he always toe the official line. Late last year, some Chinese officials pointed to findings that the virus had been found on the packaging of imported food, suggesting that the coronavirus may have been brought to China from overseas. Dr. Zhang has told his audience not to worry about it: “The chance of catching the virus from imported goods,” he said, “is lower than dying in a plane crash.”

“I’m not going to hide the information because I’m worried that I could say something wrong and cause some controversies,” he said over the summer. “We always share what we know.”

responded that protein helps build the immune system.

Still, he has kept a high profile without drawing major ire from the government or sustained criticism from the nationalists. Some of that stems from China’s pride in quickly containing the coronavirus. Dr. Zhang, who played a role in that, has won a number of awards from official groups.

In watching his speeches, I found another key to his sustained appeal. In his impromptu speech at a national teaching award ceremony in September, he said the essence of education is acknowledging human dignity. Mr. Zhang appeals to the humanity of his audience and, by admitting his own foibles, shows the authorities and the public that he is merely human, too.

In one speech, he mentioned that some victims of avian flu had caught it from taking care of their infected loved ones, and that female patients were more likely to infect their doting mothers than their absent husbands. “At that moment,” he told the audience, “I lost faith in romantic love.”

said, “I would have worked on my deltoid.”

interview last June, a reporter asked him whether anybody had reminded him to be mindful of his status as an expert and the head of an expert government panel.

“People are smart,” he responded. “They know whether you’re telling them truth or lies.”

When he gets public accolades, he often uses the occasion to highlight his causes, like more funding for infectious-disease research and for increasing the public awareness of tuberculosis and hepatitis B, two of the most common infectious diseases in China.

He also talks about people who deserved more attention, like the women among the pandemic responders whose role has often taken a back seat to the men’s in the media. “Men are on camera more,” he said at a forum on the subject, “but women did more work.”

Then he turned to the female medical workers, and bowed.

View