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Epidemiology of avian influenza A H7N9 virus in human beings across five epidemics in mainland China, 2013–17: an epidemiological study of laboratory-confirmed case series

Infectious Disease EpidemiologyPathogen PrevalenceVirus EpidemiologyVirologyDisease OutbreakDisease SurveillanceMedicineHuman BeingsEpidemiologyLaboratory-confirmed Case SeriesMainland China