News Microbes Bird flu viruses may pack tools that help them infect human cells Bringing along ANP32 proteins may give avian flu viruses a jump-start on copying themselves Avian influenza viruses, such as ones that infect chickens, can sometimes jump into animals like pigs or sheep or into people. A new study suggests how those viruses can infect other species’ cells. miljko/Getty Images Share this:EmailFacebookTwitterPinterestPocketRedditPrint By Tina Hesman Saey January 31, 2024 at 2:00 pm Bird flu viruses may pack a little taste of home to help them adapt to life in new hosts.