Yes it is harmful to people.
Why would they give it to humans if it was harmful
The answer depends on whether you want the ratio of people in the US with polio compared to people with polio in the rest of the world (or the whole world), or the compared to people without polio in the US.
250,000 people have died from Polio
250,000 people have died from Polio
Everyone who has been affected by polio have benefited from the post polio program. This includes the people who were infected by polio and the people who took care of them.
50,000 people died of polio.
Polio began in China,,,,,,! Dur you people are stupid!
i ........................................................................................................................................................................................ really dont know
Polio actually can not be cured. There is, however, a vaccination that can be taken to prevent people who do not have polio, from getting polio. The polio vaccination was created by Salk and Sabin. Originally, the polio vaccination by Salk was administered in the form of a shot. The Sabin is given by mouth.
Polio is a disease is isn't administered to anyone - that would be silly.
Scientists were able to create a vaccine that protects people from the polio virus.
because they did