Influenza A H1N1 is a virus and can be also known as swine flu.The symptoms are the same as the normal type of flu.Influenza A H1N1 can spread at a distance.So far, Influenza A H1N1 have spreaded to Malaysia and japan among Asia.Countries try to prevent Influenza A H1N1 by taking temperature daily or weekly to check whether they have no fever.I think that taking temperature is quite effective.Other preventive measures can be taken by not going to very crowded places.I wash my hands before I eat to prevent the spread of Influenza A H1N1 disease.