Can you tell me the history of smallpox vaccine?
The basis for vaccination began in 1796 when an English doctor named Edward Jenner observed that milkmaids who had gotten cowpox did not show any symptoms of smallpox after variolation.
More experiments followed, in 1801, Jenner published his treatise “On the Origin of the Vaccine Inoculation,” in which he summarized his discoveries and expressed hope that “the annihilation of the smallpox, the most dreadful scourge of the human species, must be the final result of this practice.”
At some point in the 1800s, the virus used to make the smallpox vaccine changed from cowpox to vaccinia virus.
To learn more you should go to a medical professional.
Keyword: smallpox vaccine history