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,
1974 smallpox epidemic in India 1974 smallpox epidemic in India The 1974 smallpox epidemic of India was one of the worst smallpox epidemics of 20th century. Over 15,000 people contracted and died from smallpox between January and May 1974. Most of the deaths occurred in the Indian states of Bihar, Orissa and West Bengal. There were thousands who survived but were disfigured or blinded. India reported 61,482 cases of smallpox to World Health Organization (WHO) in these five months. India had over 86% of the world's smallpox cases in 1974, primarily due to this epidemic. By January 1975, an operation was started aimed at containing