Question

Edward Jenner discovered vaccinations. He found that some of the dairymaids who worked with cows had suffered lesions on their hands, and that these dairymaids were immune to the more severe smallpox. Then, he inoculated James Phipps with material from the lesions on a dairymaids’ hands. Which best explains why Jenner decided to infect Phipps?

Answer 1

I think the best answer is the Edward wants to Vaccinate Phipps and that vaccine is similar to the kind of disease that would allow your body to be immune. With that process, cells will evolve in to an immune cells that could fight the virus. I hope you are satisfied with my answer and feel free to ask for more. 

Answer 2

The answer is B. The material contained pathogens that were similar to but weaker than the smallpox pathogen.