Cowpox to the mild form of smallpox and the observation that dairy farmers were immune from smallpox inspired the first smallpox vaccine, created and administered by English physician Edward Jenner. The word “vaccination,” coined by Jenner in 1796, is derived from the Latin root "vaccinus", meaning of or from the cow. Once vaccinated, a patient develops antibodies that make them immune to cowpox, but they also develop immunity to the smallpox virus, or "Variola virus". The cowpox vaccinations and later incarnations proved so successful that in 1980, the World Health Organization announced that smallpox was the first disease to be eradicated
1978 smallpox outbreak in the United Kingdom free of smallpox on 16 October 1978. At the time of the outbreak, the WHO had been about to certify that smallpox had been eradicated globally. It eventually did so in 1980. On 5 September 1978, Parker's 71-year-old father, Frederick Witcomb, of Myrtle Avenue, Kings Heath, died while in quarantine at Catherine-de-Barnes Hospital. He appeared to have died following a cardiac arrest when visiting his daughter. No post-mortem was carried out on his body because of the risk of smallpox infection. On 6 September 1978, Henry Bedson, then Head of the Microbiology Department at the University of Birmingham Medical School