Explained: What Is Avian Influenza, Symptoms, How Critical Is The Latest Outbreak, And More Bird flu explained: Bird flu, also called avian influenza, is a viral infection that can infect not only birds, but also humans and other animals. Representational Image Outlook Web Bureau 2021-01-06T07:12:34+05:30 Explained: What Is Avian Influenza, Symptoms, How Critical Is The Latest Outbreak, And More outlookindia.com 2021-01-06T10:02:35+05:30 Avian flu or bird flu cases have been reported in four states – Rajasthan, Madhya Pradesh, Himachal Pradesh and Kerala with hundreds of migratory birds and crows being found dead. In Haryana, though there have been suspected avian deaths, the cause is still to be confirmed.