Officials at the Lincoln Children's Zoo say five big cats tested positive for COVID-19 this week. Zoo officials announced Wednesday that two Sumatran tigers and three snow leopards were tested after they began showing symptoms of the virus during the weekend. Spokeswoman Sarah Wood said in a news release the cats are the first animals at the zoo to contract the virus. They are being treated with plans that have been successful at other zoos. Wood said it's unclear how the animals were infected, but that the public was not in danger because of the distance between the cats and zoo visitors. The animals are expected to recover.