An analysis of 101 strains of influenza A virus isolated in England and Wales during the winter of 1955-56, by laboratories of the Public Health Laboratory Service.
D004739:England; D006801:Humans; D009980:Influenza A virus; D007753:Laboratories; D009975:Orthomyxoviridae; D011634:Public Health; D012621:Seasons; D014852:Wales
INFLUENZA VIRUSES