Why children need both oral and injectable polio vaccines

On World Polio Day, observed on October 24, paediatrician Dr Rohini Nagarkar explained why the immunisation chart includes two polio vaccines: the oral polio vaccine (OPV) and the injectable inactivated poliovirus vaccine (IPV). There are three types of poliovirus, and she said the two vaccines work together to give children complete protection and support efforts to eradicate the disease.