Enter Edward Jenner, the trailblazer who revolutionized medicine in the late 18th century by using material from cowpox to protect ... leads to the formation of a blister followed by a scab ...

COPENHAGEN, Denmark — Just as modern vaccines evolved from cowpox blisters and penicillin from moldy bread, another life-saving treatment is undergoing a remarkable transformation. Scientists ...

Edward Jenner creates one of the world's first vaccines using the pus from a cowpox blister. Now hold your arm out, this won't hurt at all!

This similar virus is cowpox. The cow to the left has been intentionally infected with cowpox virus. The fluid that you collect from virus-caused pustules on the cow's udder contains many copies ...

Jenner inoculated 8 year old James Phipps with pus from the cowpox blisters of Sarah Nelmes, a milkmaid who had caught cowpox from Blossom the cow. Phipps suffered a fever, but no other symptoms.

Jenner inoculated 8 year old James Phipps with pus from the cowpox blisters of Sarah Nelmes, a milkmaid who had caught cowpox from Blossom the cow. Phipps suffered a fever, but no other symptoms.