Mozart and smallpox the imperial family were successful, and led to greater public acceptance for the procedure. Smallpox struck the Mozart family again in the next generation: Nannerl's eldest son Leopold and two of her stepchildren caught the disease during an outbreak in the Salzburg area in 1787. All three children survived. In 1796, the discovery of vaccination—the use of the related cowpox virus to immunize against smallpox—by Edward Jenner revolutionized the ability of medicine to deal with smallpox. Vaccination reached Vienna around 1800, when yet another local epidemic created impetus for its adoption. One of the doctors trained in the Vienna campaign,
Vaccination and religion out these procedures be tried for attempted murder. In 1816 Iceland made the clergy responsible for smallpox vaccination and gave them the responsibility of keeping vaccination records for their parishes; Sweden also had similar practices. When vaccination was introduced into UK public policy, and adoption followed overseas, there was opposition from trade unionists and others, including sectarian ministers and those interested in self-help and alternative medicines like homeopathy. Anti-vaccinationists were most common in Protestant countries. Those who were religious often came from minority religious movements outside of mainstream Protestantism, including Quakers in England and Baptists in Sweden. Catholic and Anglican