How likely is it, for humans to catch bird flu? Though human-to-human transmission is rare, it is possible, according to a virology expert. What infectious diseases doctors are watching closely is whether other farm animals are getting infected with the avian flu strain, known as H5N1. There are now at least 55 confirmed human cases of the bird flu in the U.S., according to the latest data from the Centers of Disease Control and Prevention, posted on Nov. 22. Read more: https://www.king5.com/article/news/health/infectious-diseases-doctors-bird-flu-cases/281-adb50a91-7538-4f18-9ab4-fbc8a24979bc