Types of flu

There are 4 types of influenza viruses, types A, B, C and D. Influenza A and B viruses circulate and cause seasonal epidemics of disease. Influenza A viruses are further classified into subtypes according to the combinations of the hemagglutinin (HA) and the neuraminidase (NA), the proteins on the surface of the virus. The common flu’s According to researchers , influenza A viruses are responsible for about 75% of confirmed flu cases, while influenza B viruses are behind approximately 25% of confirmed cases.Jan 10, 2020 And Influenza A and B can cause similar symptoms. Influenza A and B can cause the same kind of illness. Still, Influenza B tends to cause milder illness than Influenza A. Influenza B is a contagious respiratory illness caused by the Influenza virus.Mar 24, 2023 Q= How serious is influenza A? A= It can cause mild to severe illness, and at times can lead to death. The best way to prevent flu is by getting a flu vaccine each year. Influenza (flu) can cause mild to severe illness, and at times can lead to death. Flu symptoms usually come on suddenly. Visit )