when was polio controlled?

Answer 1

Polio is still not 100% controlled but with luck we will see that day arrive. Most of the cases of Polio that have occurred here in the US in the past 20 years were related to use of Oral Polio Vaccine, referred to as the Sabin vaccine because Dr. Al Sabin invented this live-attenuated vaccine that is easy to give by mouth. The risk of this vaccine is that it can revert to a more virulent form while it replicates inside the person who received the vaccine. If an unvaccinated family member makes contact with the secretions or feces of the vaccinee, there is a risk that that person may come down with paralytic polio. The oral vaccine gives a strong immunity to polio that lasts a long time. This is why that form of vaccine replaced the Salk Polio vaccine, named after Jonas Salk, its inventor. The Salk vaccine is a chemically killed vaccine. The immunity it produces does not last as long and additional shots may be needed to reach protective levels.

Rotary international spearheaded plans to eradicate Polio in the world beginning in 1979.

By the time these Global Polio eradication plans started in 1988, polio was paralyzing more than 1,000 children a day, totalling about 350,000 children annually.

The incidence of polio has since declined by more than 99 percent.

Answer 2

sometime in the mid fifties in america, some countries still have a prob with it i think