nowaday,Some disease like H1N1 and hand-foot-and-mouth disease has became an servious threaten for our health.so ,how to protect us from the diseases and remain health,first,you should stay away from susceptible population.second,you should do more excercise and eat more natural food,third ,you must develop the habit of paying attention to hygiene.I think you need not worry about the disease ,because soul is the ordinary line of defense.if you have an healthy soul.you will have an good mental healthy.