This practice became widely accepted but was eventually superseded by Jenner's work based on the hypothesis derived from widespread observation and first formulated in 1798 that cowpox infection ...

But the method was dangerous. Jenner began experimenting in his home town, Berkeley, Gloucestershire. Many people there believed that diarymaids who had caught cowpox could not catch smallpox. Cowpox ...

A young milkmaid had told him how people who contracted cowpox, a harmless disease easily picked up during contact with cows, never got smallpox, a deadly scourge. With this in mind, Jenner took ...

It was quite a victory, then, when English physician Edward Jenner developed an inoculation against smallpox in 1796. Armed with the knowledge that milkmaids who had been exposed to cowpox ...

The smallpox vaccine is not a form of variola virus, but a preparation of vaccinia (a form of cowpox) virus. In 1796, Edward Jenner, a British physician, demonstrated that infection caused by ...

Blossom the cow was the inspiration for Jenner's work on the smallpox vaccine: her cowpox passed to Sarah Nelmes, a milkmaid, and was used as the first "vaccine" against smallpox. So Blossom was ...

And this is where Edward Jenner comes in. Jenner noticed that milkmaids who caught cowpox – a disease related to smallpox but far more mild – didn’t catch smallpox. This gave Jenner an idea ...

Jenner noted that his milkmaids did not get smallpox. He suspected that they were prevented from getting the disease because they had previously contracted cowpox (a disease similar to smallpox ...

But the final breakthrough was caused by Edward Jenner, who, while aged 13 and living in England in 1749, heard a dairy maid say, “I shall never have smallpox for I have had cowpox. I shall ...

The concept of vaccines first emerged in the 18th century when Dr. Edward Jenner purposely gave a young boy cowpox. Jenner, subsequently, exposed the boy to smallpox. Interestingly, the boy did not ...