1963 Immunization Certificate Card Sabin Oral Polio Vaccine Type I II II Rare | eBay
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How the world is ending polio | News | Wellcome
NPHCDA on X: "OPV offers protection from polio disease, while IPV provides additional and rapid immunity that covers all the 3 types of poliomyelitis virus. The combination of IPV and OPV will
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