[Characteristics of several strains of influenza virus of the mixed A and A-2 type isolated in the Rumanian People's Republic in the late post-epidemic period of 1959].
D058872:Epidemics; D005006:Ethnicity; D005260:Female; D006801:Humans; D008599:Menstruation Disturbances; D009975:Orthomyxoviridae
INFLUENZA VIRUSES