Vaccination
The original meaning of the word vaccination referred to deliberate infection with vaccinia (cow pox) virus to confer cross-protection against variola, the cause of smallpox. Edward Jenner introduced this practice in 1796.4
The original meaning of the word vaccination referred to deliberate infection with vaccinia (cow pox) virus to confer cross-protection against variola, the cause of smallpox. Edward Jenner introduced this practice in 1796.4