Versalius published his book, 'thefabricofthehumanbody' in 1543.
Galen had dissected animals but not humans so there were many errors in his work.
Harvey (17th century) disproved Galen's idea that blood was produced from the liver.
He proved that the blood circulated through the body.
The Printingpress made it so surgeon's works could be spread to other surgeons.
Edward Jenner(18th century) created the firstvaccine, for smallpox.
John snow (19th century) proved that cholera was water based and not through miasma. He also created the chlorophyll inhaler.
Louis Pasteur (19th century) created germ theory, and proved germs caused decay instead of chemicals.
Robert Koch(19th century) applied Pasteur's Germ theory to human diseases. He proved that specific bacteria were responsible for a specific disease from experimenting on animals.
Paul Ehrlich (19th century) discovered magic bullets that would stain and kill a specific type of bacteria.
Alexander Fleming(19th century) left petri dishes open. Mould grew on one and he noticed germs near the mould had been killed.
Florey and Chain (19th century) tested on a human with penicillin vaccine, they then made the government mass produce it in WW2.