Scientists do not have a theoretical misunderstanding of viruses. But the general public often does. If you gave everyone IPV, anyone who is not immunocomprom

Scientists do not have a theoretical misunderstanding of viruses. But the general public often does. If you gave everyone IPV, anyone who is not immunocompromised will be protected from severe cases of polio. Yay! But polio can still circulate and be looking for new victims. It is hard to tell how big a problem this is until you stop vaccinating. When people get OPV, it stops them from being part of polio circulation, but can also START polio circulating. Therefore it is needed to stop transmission, but you don't want it if there is no transmission in the community. We already eradicated 2 forms of polio. But the question is whether we can realistically eliminate the last.