According to the National Immunisation Schedule, OPV (oral polio vaccine) contains how many types of Poliovirus? A. Type 1 B. Type 2 C. Type 3 D. Type 4
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The inclusion of Type 1, 2, and 3 in OPV helps ensure broad immunity against polio.
Step 1: Understand the types of poliovirus in OPV.
The oral polio vaccine (OPV) contains Type 1, Type 2, and Type 3 poliovirus strains to provide immunity against these three types of the virus.
Type 4 poliovirus is not included in the OPV.