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 One of the easiest ways to relieve stress is to actually win. Try practicing in another part of the game, and going back to the frustrating part. You'll feel the frustration go away when winning.  Video games are supposed to be fun.