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.
There is still no cure for the disease. But at the peak of its devastation in the United States, Jonas Salk introduced a way to prevent it. This infectious viral disease attacks the nerve cells and sometimes the central nervous system, often causing muscle wasting and paralysis and even death.