Well, this is what CDC claims https://www.cdc.gov/vaccines/vpd/polio/hcp/effectiveness-duration-protection.html https://www.cdc.gov/vaccines/vpd/polio/hcp/effec

Well, this is what CDC claims https://www.cdc.gov/vaccines/vpd/polio/hcp/effectiveness-duration-protection.html https://www.cdc.gov/vaccines/vpd/polio/hcp/effectiveness-dur... Yes, I know about this mutated live vaccine. It for sure looked like a great idea on paper.