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.
Polio was one of the most feared disease throughout history. After the general outbreak across Europe, there was a race to find a vaccine. The public fear of this disease was high as it left children paralyzed for life - an example being Franklin Roosevelt. And Salk was the first to come up with a trial vaccine which was successfully adopted. The moral ramifications of not patenting his vaccine are tremendous and can be debated upon for hours. Salk, after the new found fame went back to his roots, declaring that he was a scientist, not a celebrity.