What are three pieces of evidence that support the claim that jenner has been given credit for starting and spreading the practice of immunization?

Sample Response: Three pieces of evidence for Jenner getting credit for the spread of immunization are that he tested the practice scientifically, he sent out the vaccine to anyone who wanted it, and he gave the vaccine to someone who gave it to Thomas Jefferson.

Explanation:The mothers memeories. As she used in years gone.To regard the darling dreamers Ere she left them till the dawn;