In science-based medicine, the vaccination theory states that an individual being infected with a “weakened form” of the virus has the propensity to develop some form of resistance towards the virus itself. This is a case study of the epidemic of smallpox inflicted on man. It had been remarked that those who have succumbed to the disease before, will be immune to it at a later time. Administration of the infective agent was perceived to have expressed some possible immunity in those who were in good health. English physician Edward Jenner happened to be in a countryside where milkmaids became infected with cowpox. Cowpox is alike to smallpox, only it is an innocuous disease. People then believed that whoever was to come down with cowpox are
