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> If you're given the OPV vaccine, you eventually will have sterilizing immunity, and won't spread it, once immunity develops a small time after vaccination. Bu
by mlyle 5y ago
> If you're given the OPV vaccine, you eventually will have sterilizing immunity, and won't spread it, once immunity develops a small time after vaccination. But the OPV vaccine itself very rarely causes polio outbreaks.
- selimthegrim 5y agoApparently some old P2 vaccine was kept around after it was supposed to be disposed of nationwide and inadvertently administered.