Oral polio virus vaccines (OPV) are the predominant vaccine used in the fight to eradicate polio. There are different types of oral poliovirus vaccine(opv), which may contain one, a combination of two, or all three different stereotypes of attenuated vaccine. OPVs are safe and effective and offer long lasting protection against the stereotype(s) which they target. OPV stimulates good mucosal immunity, which is why it is so effective at interrupting transmission of the virus It recommends three or four doses starting at two months of age.
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