no

A treatment for mental or very ill health.

god knows :D

Cowpox was probably known as long as people have had domesticated cattle.

However the observation was not made until the late 1700s that infection with cowpox from working with cattle infected with cowpox prevented infection with smallpox. This observation eventually led to the introduction of safe vaccination (using cowpox pus taken from cattle) to replace often hazardous variolation (using smallpox pus taken from humans).

The procedure of variolation was already in use in the Ottoman Court in Istanbul, Lady Mary Montague brought the procedure to England and an inoculation was performed on her son in March 1718 and was successful. A licence was granted to perform the procedure on six prisoners in Newgate Jail and all survived. Later Jenner vaccinated a small boy and he survived. It was believed that this procedure was founded on the fundamental principals of right conduct rather than on legalities.

Further to this he carried out experiments on human blood and made great progress in clinical surgery and enjoyed substantial success. His actions were defined by the high standards of honest and honourable dealings in the methods used. As a result of his work, he improved the health of countless millions of people. History records this as being morally right.