This is common after recovering from Swine Flu. Consult your doctor who can prescribe some supplements as per requirement and also some simple exercises. Listen to the body, don't overdo anything. • Once you are feeling over the worst, go for a gentle walk to get some fresh air. But don't over-exercise, and go back to it gradually. • Don't panic if you don't feel like eating. Try to eat small meals, often. This is better than going from no food to bingeing. It sounds obvious, but eat healthy food. • Get enough sleep – between eight and 10 hours a day, if possible.