نتایج جستجو برای: 2008 and 2009
تعداد نتایج: 16867267 فیلتر نتایج به سال:
Background: Influenza virus is a major infectious pathogen of the respiratory system causing a high degree of morbidity and mortality annually. The worldwide vaccines are decided and produced annually by World Health Organization and licensed companies based on the samples collected from all over the world. The aim of this study was to determine phylogenecity and heterogenecity of the circulati...
CONTEXT The clinical characteristics of pandemic 2009 influenza A(H1N1) infections have not been compared directly with illnesses caused by other influenza A strains. OBJECTIVE To compare clinical features and outcomes for 2009 H1N1, seasonal H1N1, and H3N2 influenza in a population-based cohort. DESIGN, SETTING, AND PARTICIPANTS Active surveillance with 30-day follow-up for influenza cases...
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