Edward Jenner, a physician in the late 18th century, is credited with being the "Father of Immunology." It was observed at the time that milkmaids had a lower incidence of smallpox than the general population. Jenner believed that the milkmaids caught cowpox from cows by contact with blisters. Jenner inoculated an 8 year old boy by transferring material from cowpox blisters of an infected person onto the scratched skin of the boy. Cowpox, although not the same as smallpox, is similar to the virus. People inoculated with cowpox material were able to be immune to smallpox.
It was Edward Jenner.
Who played an important role in the spread of Spanish settlements throughout the U.S.?
Who played an important role in the spread of Spanish settlements throughout the U.S.?
The monks played an important role in writing and interpreting the history and traditions of the Ethiopian kingdom.
Serving in the government
Tectonic processes have played an important role in shaping the physical landscape of east Africa.
Madison played such an important role in the writing of the US Constitution that he is still called the Father of the Constitution.
The monks played an important role in writing and interpreting the history and traditions of the Ethiopian kingdom.
When These persons who created very accurate maps of the world played an important role in European exploration who are? When These persons who created very accurate maps of the world played an important role in European exploration who are?
He played an important role in the development of the earliest programmable loom (the "Jacquard loom"), which in turn played an important role in the development of other programmable machines, such as computers.
Key role means an important role played by someone, meaning of it is positive in nature...
the Compromise of 1850