Anthrax vaccines known to result in far less scarring, and greatly reduced mortality, in comparison with the naturally acquired disease. The English physician Edward Jenner (1749–1823) had also discovered (1796) the process of vaccination by using cowpox to give cross-immunity to smallpox and by Pasteur's time this had generally replaced the use of actual smallpox material in inoculation. The difference between smallpox vaccination and anthrax or chicken cholera vaccination was that the weakened form of the latter two disease organisms had been "generated artificially", so a naturally weak form of the disease organism did not need to be found. This discovery revolutionized
1947 New York City smallpox outbreak days. She pleaded guilty to unlawful practice of medicine, assault, and illegal possession of a hypodermic needle, and was sentenced to six months in jail. 1947 New York City smallpox outbreak The 1947 New York City smallpox outbreak occurred in March, 1947 and was declared ended on April 24, 1947. The outbreak marked two milestones for America. First, it was the largest mass vaccination effort ever conducted for smallpox in America, and second, it marked the last outbreak of smallpox in America. Within three weeks of the discovery of the outbreak, the U.S. Public Health Service, in conjunction with New