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See the list of featured NIAID clinical trials below or view the complete list of NIAID studies recruiting participants on ClinicalTrials.gov.
The purpose of this observational study is to describe the characteristics and outcomes over a 60-day follow-up period of participants with influenza virus infection (including influenza A subtypes such as H3N2 and 2009 H1N1, or influenza B), or a targeted non-influenza respiratory virus, who are hospitalized with severe illness and/or complication in geographically diverse locations.