Causes of the flu. The flu is caused by influenza virus types A, B, and C. Both type A and type B flu viruses are responsible for the seasonal outbreaks of flu. Type A flu viruses are found in many different animals, including ducks, chickens, pigs, and horses. Influenza B viruses circulate widely only among humans.
Find healthy ways to manage stress. Consider healthy, stress-reducing activities such as meditation, exercising or talking things out with friends or family. Keep in mind that unhealthy behaviors develop over time and can be difficult to change. Don't take on too much at once.
1 Laugh It Off Laughter can reduce the physical effects of stress (like fatigue) on the body. 2  Drink Tea One study found that drinking black tea leads to lower post-stress cortisol levels and greater feelings of relaxation.  Exercise That post-exercise endorphin rush is one way to sharply cut stress.