To do that with DNA, we need to tell the DNA what to replicate, and then give it the means to do so. We do this by using enzymes and primers. Primers are a subject for another time, but they are responsible for telling the polymerase where to do its work.
Polio was nearly eradicated when society decided to mass produce and use a vaccine created by Jonas Salk. Polio was a big issue but they managed to cure it with a vaccine. Comments.
The inventor of the polio vaccine didn't patent it. Jonas Salk invented the polio vaccine in 1953 but never patented it. He believed that, like the sun, a vaccine for polio belonged to the people. Salk tested the vaccine on himself and his own family first and later went on to work on a cure for AIDS.