Mass inoculation of the Salk polio vaccine with the multiple dose jet injector.
D006801:Humans; D007267:Injections; D032541:Mass Vaccination; D011051:Poliomyelitis / Q000517:prevention & control*; D011054:Poliovirus Vaccine, Inactivated
D011054:Poliovirus Vaccine, Inactivated
POLIOMYELITIS/prevention and control