Logically it's a YES Voilation of medical ethics, which includes experimenting on a subject without consent. However, in this case their is no good or bad their is only better or worse. If the above policy is not supported a pandamec may develop without a vaccine, evenutally causing millions of deaths. These criminals are of no good to the society, on the contrary have voilated human rights. Hence, they are better option for experimentation rather than animals. Their indulgence may be compensated with their punishment.