India holds key to polio-free world.
Heymann
David L
DL
D006801:Humans; D007194:India / Q000453:epidemiology; D032541:Mass Vaccination; D009313:National Health Programs; D011051:Poliomyelitis / Q000453:epidemiology / Q000517:prevention & control*; D023321:Poliovirus Vaccines / Q000600:supply & distribution*; D011159:Population Surveillance; D016730:Program Development; D040241:Social Marketing
D023321:Poliovirus Vaccines