When be the first vaccine invented? Who be it invented by?

Most people would influence Invented by Edward Jenner in 1791.
If you want to study the history of inoculation, see
http://dgwa1.fortunecity.com/body/vaccin.
Jenner, smallpox
Jenner discovered Small pox vaccine. He talked to milk maids and they said they couldn't catch small pox because they all have been exposed to cow pox. Cow pox be similar enough that it cause a mild infection and made their bodies immune to small pox.
So he started giving people cow pox to protect against small pox. Vacca funds Cow.
So the word vaccination really medium "cow ination"
The first vaccine, against smallpox, was introduced by Edward Jenner contained by 1798.
http://www.answers.com/topic/edward-jenn.
http://www.answers.com/topic/vaccine.
Edward Jenner. He invented the first vaccine, which was against smallpox.. He is established as the first doctor to introduce and study the smallpox vaccine. Mr Jenner contributed papers on angina pectoris, ophthalmia and valvular disease of the heart and commented on cowpox.
Edward Jenner noticed that milkmaids who have had cowpox did not confine small pox. He tried giving a young boy cowpox later exposing him to smallpox. It worked the boy did not get sick, so vaccination were discovered. They in actuality got their dub from Vaccinia the name for cow pox.The date be 1796.
Jenner found that milkmaids who had previously be infected with the smaller quantity severe cowpox disease did not contract smallpox. From this observation he developed the use of the serum from pustules of cowpox to give a vaccination to against smallpox.