influenza, or the flu is an acute respiratory infection caused by various types of influenza viruses

Seasonal influenza, or the flu, is an acute respiratory infection caused by various types of influenza viruses, of wh ich types A (including subtypes H1N1, H3N2 and more) and B cause the most cases during the flu season. When people are affected by the flu, they typically experience mild to severe symptoms, including fever, dry cough, so re throat, shortness of breath, fatigue, headache or body ache, and a runny nose. Infection can be transmitted fr om an infected person through the air when they talk, cough, or sneeze. As it is spreads easily, individuals may be at risk of catching the flu from public settings, like schools or workplaces.