In mismatched years without precise estimates of the distribution of type B lineages, the available descriptions suggest that all of the mismatches were likely to be significant or complete. 4 DISCUSSION The evidence we reviewed from the published literature indicates that influenza is an important cause of morbidity in the Asia‐Pacific region and affects all age groups.
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Literature review of the epidemiology of influenza B disease in 15 countries in the Asia-Pacific region.
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