influenza a virus influenza a This rapid evidence summary identified and summarised evidence relating to the infectious and incubation period of influenza H5. It explores the time frame in which an individual may transmit
influenza a symptoms The CDC tracks flu activity using reports of doctor’s visits for flu-like illnesses—symptoms such as fever combined with a cough or sore throat—rather than confirmed cases of influenza. This approach means the data may include other respiratory illnesses like RSV or the common cold
influenza a Influenza is an acute respiratory infectious disease caused by influenza viruses. Seasonal influenza leads to approximately one billion cases annually, with 3–5 million cases of severe illness