Answer
Influenza is a virus that causes the flu. It can be spread through the air, contact with surfaces, and through bodily fluids. Influenza can cause a variety of symptoms, including fever, cough, sore throat, runny nose, and muscle aches. In some cases, influenza can lead to more serious complications, such as pneumonia. Burnet developed assays for the isolation, culture, and detection of influenza viruses.