Vaccination disease people tried to prevent by inoculation and was the first disease for which a vaccine was produced. The smallpox vaccine was invented in 1796 by English physician Edward Jenner and although at least six people had used the same principles years earlier he was the first to publish evidence that it was effective and to provide advice on its production. Louis Pasteur furthered the concept through his work in microbiology. The immunization was called "vaccination" because it was derived from a virus affecting cows ( 'cow'). Smallpox was a contagious and deadly disease, causing the deaths of 20–60% of
Mozart and smallpox named Doutrepout, then brought vaccination to Mozart's native city of Salzburg. According to Halliwell, "popular resistance was fierce," and both the government and the Roman Catholic Church (previously an opponent) took stern measures to promote vaccination. The first relative of Mozart's known to have been vaccinated was Johanna Berchtold von Sonnenberg, called "Jeannette" (1789–1805), Nannerl's youngest child; she was vaccinated during the 1802 campaign in Salzburg. With vaccination, great progress was made in reducing incidence of the disease, and it was eventually confirmed as eradicated in 1979. Mozart and smallpox In 1767, the 11-year-old composer Wolfgang Amadeus Mozart was struck