title: Influenza A H2N2 saga remains unexplained.
authors.forename: Roxanne
authors.initials: R
authors.lastname: Nelson
mesh_terms: D006801:Humans; D053121:Influenza A Virus, H2N2 Subtype; D009980:Influenza A virus; D007753:Laboratories / Q000592:standards; D012306:Risk; D013048:Specimen Handling / Q000592:standards*