APP Novel influenza A (H1N1) is a new flu virus of swine origin that was first detected in April, 2009. The virus is infecting people and is spreading from person-to-person, sparking a growing outbreak of illness in the United States. An increasing number of cases are being reported internationally as well. It‘s still uncertain at this time how severe this novel H1N1 outbreak will be in （共 918 字） [閱讀本文] >>
