Bird Flu (Avian Flu H5N1) Avian (bird) flu is an illness also caused by an influenza- A virus. Most human illnesses from avian flu have been caused by the LPAI (low pathogenic avian flu) H7N9 and HPAI (high pathogenic avian flu) H5N1 variants that have genetic similarities to viruses found to infect birds. People infected with bird flu have often been in close contact with sick birds and their droppings, or in direct contact with someone else already infected with the bird flu virus. Bird flu can cause fever, difficulty breathing, diarrhea, headache, body aches, confusion, sore throat, and runny nose. Bird flu can be life threatening. About 40% of those infected with H7N9 and 50% of people infected with the H5N1 variant die from complications. Bird Flu Treatment Antiviral medications are usually prescribed and can help you cope with avian flu. Severe infections usually require hospitalization in an intensive care unit with supportive treatments like mechanical breathing support and oxygen administration. Bird Flu Vaccination and Prevention The best way to prevent bird flu it is to avoid sources of exposure like contaminated poultry farms, aviaries, or coops. In case of a bird flu outbreak, an H5N1 vaccine is available from the US government; it is not typically suggested as a season flu vaccine.