To evaluate the safety of influenza Type A (H1N1) vaccine by review the incidence, epidemiology characteristics of sudden death and the deaths related with immunization, especially focus on the sudden deaths after immunization of influenza Type A (H1N1) vaccine. Preliminary showed that those deaths reported as adverse events following immunization did not associated with the vaccine. Vaccination campaign according to the national immunization strategy should be carried out and appropriately respond to the emergency events should be strenghtened.