tom swift among the diamond makers

 the polio epidemic was a pretty serious epidemic it happened just about the first have of the nineteen hundreds. or something like that and polio was a disease that struck quickly and left no living before you could get any help, not like a heart attack this person named Jonas Salk. worked on away at a vaccine hoping that the deadly virus would still get you sick but your body still was able to figure out how to destroy it so if they actually got it your body would be able yo fight it this vaccine worked very well he worked with three groups of children because the children I think are the only people that I think can get it one he gave the vaccine another something else and another nothing the people with the vaccine did the best now that very vaccine may still be used today in 2020.