Eight infected gorillas had symptoms including runny noses, coughing and lethargy
San Diego zoo has vaccinated nine great apes for coronavirus after a troop of gorillas became infected.
Four orangutans and five bonobos received Covid-19 vaccine injections in January and February. Three more bonobos and a gorilla were also were expected to receive the experimental vaccine, which was developed by Zoetis, a firm that produces medicine for animals.
