How can humans contract poliomyelitis?

Virus: Poliomyelitis is a viral infection. It has been nearly, but not completely eradicated from the world, but there are still cases in countries such as pakistan, afghanistan and nigeria. Although, not recently seen in usa, it is still important to vaccinate for polio. Since it has not been completely eradicated it would only take a few years for it to come back if we stopped vaccinations.

You eat it: This is caused by an enterovirus (gut virus) that is shed in the stool of infected carriers for weeks after what is usually a mild diarrhea. A percentage of those will develop paralytic polio weeks later as a lingering effect. Vaccination has essentially eliminated these strains from North America but it persists in pockets of the third world.It could return via air travel if vaccinations stop.