Avian influenza (AI), also called bird flu, is an infectious viral disease that spreads among birds. However, it has started affecting humans since 1997, causing serious infections in people. People infected with bird flu may show the following symptoms – fever, cough, sore throat, nausea, muscle aches, eye infections, etc. Some people may develop severe respiratory problems and pneumonia. Several antiviral drugs are being used to treat bird flu. However, […]