Which of the following findings was essential for Edward Jennerʹs vaccination process?
A) Someone who recovers from a disease will not acquire that disease again.
B) Exposure to a milder disease form may produce immunity.
C) Pathogenic microorganisms infect all humans and animals in the same manner.
D) Disease is caused by viruses.
E) A weakened microorganism will not cause disease.

Question

Quizplus · Accepted Answer

Edward Jenner's vaccination process was based on the observation that exposure to cowpox, a milder disease, provided immunity to smallpox, a more severe disease.

Which of the Following Findings Was Essential for Edward Jennerʹs