At least two guerrillas have been tested positive for corona
at the San Diego Zoo in the United States of America.
According to the news agency, both the guerrillas had symptoms of corona since last week.
Both of them may have contracted corona from a zoo worker who did not have corona symptoms but was infected with the virus.
San Diego Zoo Safari Park
closed to tourists from early December 2020. Also, the Guerrillas are kept under observation.