[Influenza epidemic situation in the USSR in 1971 and the beginning of 1972].
D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control; D009787:Occupational Medicine; D014586:USSR; D014611:Vaccination
D007252:Influenza Vaccines
Epidemicheskaia situatsiia po grippu v SSSR v 1971 godu-nachale 1972 goda.