This may be about Doctor Edward Jenner.
He created the first vaccine. It was to treat smallpox and was based on material from the cowpox. So, he created the vaccine from cowpox.
I think the vaccine also worked against the cowpox virus.
Louis Pastuer Invented the vaccine for cowpox.
The cure for smallpox is cowpox. Cowpox is a mild version of smallpox and is usually not fatal. The smallpox vaccine contains cowpox.
Edward Jenner He noticed that people who had cowpox did not suffer from smallpox. He found a young boy whose family had smallpox and inserted the pus from a cowpox pustule into a cut. The boy survived.
Edward Jenner, in the late 1700s
Edward Jenner used it to help create a vaccine for smallpox
Usually, it is a cowpox vaccine, which is usually composed of a dead or dying/weak cowpox unit. This alerts your immune system, so that if you ever get it, your body will recognize it and fight it away.
Edward Jenner created the first vaccine to be widely used in 1796; others had done the same before him, but their discoveries were not well-known. Jenner found that milkmaids infected with cowpox did not get smallpox. He tested this theory on a young boy, first exposing him to cowpox, then smallpox. The boy did not develop smallpox, and Jenner's work was published widely.
Cowpox. Edward Jenner inoculated a boy with cowpox in early discovery of smallpox vaccine, it is part of the Vaccinia virus family
Cowpox is a virus that causes blisters, similar to smallpox. It was most commonly seen in 'milk maids' - young female workers that milked dairy cows for a living - so it was called cowpox. In the 1800s, a physician noted that milk maids who had recovered from cowpox did not contract smallpox, and the first vaccine was developed.
Louis PasteurEdward Jenner found that people who contracted the cowpox virus didn't contract smallpox so he tested it out on a farmer's son who had contracted smallpox that week and he applied the liquid inside a cowpox sore to a cut and then after he healed from cowpox, he injected the liquid from a smallpox sore and the boy didn't contract smallpox.Which is how he found the vaccine...Note: Developed not invented
The smallpox vaccine was developed by Edward Jenner, an English physician. He noticed that dairywomen who had caught cowpox - a related disease - did not catch smallpox. So he inoculated people with weakened cowpox, their bodies built up the antibodies to cowpox which then also protected them against smallpox.Cowpox is known as Variolae Vaccinae (vacca = cow in Latin) and hence the name.
Dr Edward Jenner injected small boy who had smallpox with cowpox, after hearing from a dairy maid that people who got cowpox would not get smallpox. This worked and that's how vaccination came about.