Types of Influenza

Influenza (flu) is medically defined as a contagious viral infection mainly affecting the nose, throat, airways, and lungs.  There are several strains of viruses blamed for causing flu.  Each strain can mutate and change frequently.  Type A is most common and found in many animals as well as humans.  It’s credited with causing the worst kinds of flu.  Type B is said to cause milder cases of flu.  Type C hasn’t been associated with causing the annual plague of flu.  A common cold is not considered to be flu.  Stomach flu s not influenza.