Respuesta :

Answer:

There are three types of flu viruses: A, B, and C. Type A and B cause the annual influenza epidemics that have up to 20% of the population sniffling, aching, coughing, and running high fevers. Type C also causes flu; however, type C flu symptoms are much less severe.

Explanation:

The three basic versions (strains) of influenza are types A, B, and C.