An unvaccinated health care worker set off a Covid-19 outbreak at a nursing home in Kentucky where the vast majority of residents had been vaccinated, leading to dozens of infections, including 22 cases among residents and employees who were already fully vaccinated, a new study reported Wednesday.
Most of those who were infected with the coronavirus despite being vaccinated did not develop symptoms or require hospitalization, but one vaccinated individual, who was a resident of the nursing home, died, according to the study released by the Centers for Disease Control and Prevention.
Altogether, 26 facility residents were infected, including 18 who had been vaccinated, and 20 health care personnel were infected, including four who had been vaccinated. Two unvaccinated residents also died.
The report underscores the importance of vaccinating both nursing home residents and health care workers who go in and out of the sites, the authors said. While 90 percent of the 83 residents at the Kentucky nursing home had been vaccinated, only half of the 116 employees had been vaccinated when the outbreak was identified in March of this year.
identified 627 coronavirus infections in 78 skilled nursing facilities in the city in February, but only 22 were found in individuals who were already fully vaccinated. Two-thirds of the cases in the vaccinated individuals were asymptomatic, the report found, but two residents were hospitalized, and one died.
The authors of the Chicago study said their findings demonstrate that nursing homes should continue to follow recommended infection control practices, such as isolation and quarantine, use of personal protective equipment and doing routine testing, regardless of vaccination status.
They also emphasized the importance of “maintaining high vaccination coverage among residents and staff members” in order to “reduce opportunities for transmission within facilities and exposure among persons who might not have achieved protective immunity after vaccination.”