title: Recurrence of influenza with A2-Hong Kong-68 within two months.
mesh_terms: D000328:Adult; D002908:Chronic Disease; D005260:Female; D006801:Humans; D007251:Influenza, Human / Q000382:microbiology*; D009975:Orthomyxoviridae / Q000302:isolation & purification / Q000472:pathogenicity; D011247:Pregnancy