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Oral polio vaccine can rarely recombine can sometimes recombine into a virulent form, which can infect people that haven't been vaccinated (This does not happen
by FreeFull 7y ago
Oral polio vaccine can rarely recombine can sometimes recombine into a virulent form, which can infect people that haven't been vaccinated (This does not happen with the injectable form of the vaccine).
Also, extremely rarely, someone's immune system can react rather badly to a vaccine. It's also possible to be allergic to one of the ingredients in the vaccine.
- darkerside 7y agoThank you for engaging instead of downvoting. It's like people don't want to admit there could be issues with any vaccine, which is of course untrue. It doesn't mean they aren't the right call _on balance_, but pretending there are literally no risks is going to alienate people. It's reminiscent of the war on drugs (albeit in reverse), where marijuana was demonized, but the truth was obviously so different. Those are scientifically understood and accepted risks. With the limitations of with epidemiological studies, and difficulty associated with replicating vaccine studies in any other way, it's hard to justify the level of certainty I see in the scientific community.