Why children need both oral and injectable polio vaccines

Two polio vaccines, the oral polio vaccine (OPV) and the injectable inactivated poliovirus vaccine (IPV), work together to give children complete protection, paediatrician Dr Rohini Nagarkar explained around World Polio Day on October 24. Most people link polio vaccination with the oral 'two drops' campaign. With three distinct types of poliovirus, she said both vaccines remain vital to eradicating the disease.