Pneumonia and Influenza Mortality Surveillance(2009)

Pneumonia and Influenza Mortality Surveillance(2009)

Since April 2009, pandemic influenza A (H1N1) cases have been broken out worldwide. On April 26, 2009, World Health Organization (WHO) announced the definition of pandemic influenza A (H1N1). In Taiwan, the disease was immediately listed in Category 1 notifiable communicable diseases. Later, as many H1N1 patients developed only mild symptoms, WHO defined this epidemic as a “mild” one. Thus, since June 19, H1N1 was excluded from the Category 1 notifiable communicable diseases. Any influenza A (H1N1) cases with severe complications should be reported in accordance with regulations applicable to Category 4 notifiable communicable diseases, and subject to that category’s corresponding prevention and control measures.