Animal keepers at the Smithsonian's National Zoo in Washington, DC, are keeping a close eye on their lions and tigers after the big cats tested presumptive positive for Covid-19.
원문출처 : https://www.cnn.com/2021/09/18/us/coronavirus-big-cats-national-zoo-trnd/index.html
원문출처 : https://www.cnn.com/2021/09/18/us/coronavirus-big-cats-national-zoo-trnd/index.html