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
History of smallpox in Mexico were buried and to build cemeteries outside the city. This strategy was approved by City Council in September 1779. The next phase of eradication started in 1803 when Francisco Javier Balmis started the vaccination campaign in New Spain. This vaccine was used until 1951 when smallpox was declared officially eradicated in Mexico. History of smallpox in Mexico The history of smallpox in Mexico spans approximately 500 years of prevalence from the arrival of the Spanish to the official eradication in the country in 1951. It was brought to Mexico by those in Spanish ships, then spread to the center of