Edward Jenner
The smallpox vaccine, introduced by Edward Jenner in 1796, was the first successful vaccine to be developed
Uhhh need more info for an answer
Answer:
El Camino Real connected with the Santa Fe Trail at Santa Fe and became the essential link between the growing U.S. economy and the long-established Mexican economy for the next 60 years.
Explanation:
A: It wiped out nearly all of the Jews in Poland