Polio in Russia.
Vlassov
V V
VV
D004196:Disease Outbreaks; D006801:Humans; D011051:Poliomyelitis / Q000453:epidemiology* / Q000517:prevention & control; D011054:Poliovirus Vaccine, Inactivated; D012426:Russia / Q000453:epidemiology; D014611:Vaccination
D011054:Poliovirus Vaccine, Inactivated