Articles: pandemics.
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To describe the clinical manifestations of patients affected with a novel influenza A (H1N1 2009) during the pandemic. ⋯ Younger people were more likely to be infected with influenza A H1N1 2009. The clinical manifestations were similar to the seasonal influenza. However, the mortality rate was much higher, particularly in patients who developed pneumonia. In this study, all patients who died had existing underlying medical conditions.
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A novel influenza H1N1 began in March 2009, rapidly spread, and then became a pandemic outbreak. Diagnosis by polymerase chain reaction result was not always available because of a surge in workload and therefore clinical diagnosis became important. However, clinical differences between the patients infected by the novel H1N1 virus and those infected by the influenza-like non-novel H1N1 have not been reported. This study was conducted to compare the demographic background, clinical manifestations, and laboratory findings between novel H1N1 influenza infections and other non-novel H1N1 infections. ⋯ When a patient presents with influenza-like acute febrile respiratory illness symptoms and is young in age, has a travel history involving an affected area, and is suffering from myalgia or leukopenia, physicians should be alerted to the possibility of novel H1N1 virus infection.