Avian Flu In Humans Had Multiple Effects: Can Even Cross Placenta To Fetus (Science Daily) H5N1 influenza, also known as avian influenza, is considered a major global threat to human health, with high fatality rates. Studies of human H5N1 victims shed light on the anatomic distribution of the avian flu virus and its pathogenesis. Scientists found that the avian influenza H5N1 virus affects much more than respiratory system: disseminates to gastrointestinal tract, immune and central ... [News Source]