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.
Other strategies for reducing stress include: 1  Identify what's causing stress. Monitor your state of mind throughout the day. 2  Build strong relationships. Relationships can be a source of stress. 3  Walk away when you're angry. Before you react, take time to regroup by counting to 10. 4  Rest your mind.