The San Diego Zoo has given nine apes an experimental coronavirus vaccine developed by Zoetis, a major veterinary pharmaceuticals company.
In January, a troop of gorillas at the zoo’s Safari Park tested positive for the virus. All are recovering, but even so, the zoo requested help from Zoetis in vaccinating other apes. The company provided an experimental vaccine that was initially developed for pets and is now being tested in mink.
Nadine Lamberski, a conservation and wildlife health officer at San Diego Zoo Global, said the zoo vaccinated four orangutans and five bonobos with the experimental vaccine, which is not designed for use in humans. Among the vaccinated orangutans was an ape named Karen, who made history in 1994 when she became the first orangutan to have open-heart surgery.
Dr. Lamberski said one gorilla at the zoo was also scheduled to be vaccinated, but the gorillas at the wildlife park were a lower priority because they had already tested positive for infection and had recovered. She said she would vaccinate the gorillas at the wildlife park if the zoo received more doses of the vaccine.
the danger the virus poses to great apes and other animals, but also about the potential for the virus to gain a foothold in a wild animal population that could become a permanent reservoir and emerge at a later date to reinfect humans.
Infections in farmed mink have produced the biggest scare so far. When Danish mink farms were devastated by the virus, which can kill mink just as it kills people, a mutated form of the virus emerged from the mink and reinfected humans. That variant showed resistance to some antibodies in laboratory studies, raising suspicion that vaccines might be less effective against it.
That virus variant has not been found in humans since November, according to the World Health Organization. But other variants have emerged in people in several countries, proving that the virus can become more contagious and in some cases can diminish the effectiveness of some vaccines.