Two years after Kennedys description appeared, March 1718, Dr. Charles Maitland successfully inoculated the five-year-old son of the British ambassador to the Turkish court under orders from the ambassadors wife Lady Mary Wortley Montagu, who four years later introduced the practice to England.An account from letter by Lady Mary Wortley Montagu to Sarah Chiswell, dated 1 April 1717, from the Turkish Embassy describes this treatment:

The small-pox so fatal and so general amongst us is here entirely harmless by the invention of ingrafting (which is the term they give it). There is a set of old women who make it their business to perform the operation. Every autumn in the month of September, when the great heat is abated, people send to one another to know if any of their family has a mind to have the small-pox. They make parties for this purpose, and when they are met (commonly fifteen or sixteen together) the old woman comes with a nutshell full of the matter of the best sort of small-pox and asks what veins you please to have opened. She immediately rips open that you offer to her with a large needle (which gives you no more pain than a common scratch) and puts into the vein as much venom as can lye upon the head of her needle, and after binds up the little wound with a hollow bit of shell, and in this manner opens four or five veins.
Terminology
The word "vaccine" is derived from Variolae vaccinae (i.e. smallpox of the cow), the term devised by Jenner to denote cowpox and used in the long title of his An enquiry into the causes and effects of Variolae vaccinae, known by the name of cow pox. Vaccination, the term which soon replaced cowpox inoculation and vaccine inoculation, was first used in print by Jenners friend, Richard Dunning in 1800. Initially, the terms vaccine/vaccination referred only to smallpox, but in 1881 Louis Pasteur proposed at the 7th International Congress of Medicine that to honour Jenner the terms be widened to cover the new protective inoculations being introduced. According to some sources the term was first introduced by Jenners friend Richard Dunning in 1800. References
Further reading
External links

Smallpox US Centers for Disease Control and Prevention
Smallpox Center for Infectious Disease Research and Policy
"Monkeypox Update: FDA Authorizes Emergency Use of Jynneos Vaccine to Increase Vaccine Supply". U.S. Food and Drug Administration. 10 August 2022.