Thank. Either way, this is from the oral polio vaccine. Its shelf stable, easily given to a child, and is extremely effective. Downside? It is an attenuated v

Thank. Either way, this is from the oral polio vaccine. Its shelf stable, easily given to a child, and is extremely effective. Downside? It is an attenuated virus. A weakened virus. And the stupid thing 'fixes' itself in the intestines, and causes fecal contamination with infection virus. Normal polio produces infectious poop, too. The person taking it is fine, but not always the unvaccinated around them. So why still use it? NA and Europe don't use it anymore because of this, but it is stable and can be given orally in a non-sterile environment. You can just dropper it into a child's mouth and win. We even classically put drops onto sugar cubes so kids would find it palatable. It is the tool that's helped nearly eradicate polio in the world. But then we get antivaxxers in the US who wouldn't even want OPV.