The Health Officials first must know against which disease the vaccine has to developed. They should also understand the way the vaccine to be developed will react in the body. Various trials should be carried out before making it available in the stores. They should also conduct mass vaccination focusing in high risk and exposure areas. The Individuals who are less prone to the infection must be vaccinated at last. A contrary outcome is the individuals who are less practical to the disease can without much of a stretch get tainted by people who don't know that they convey the infection or not ready to get the vaccine due to religious, social and philosophical conviction.