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?

To analyze why he inoculates the boy, you need to analyze what happens with vaccines.

A vaccine is a solution with a decreased or dead virus. Our body recognizes that virus and creates anti-viruses. If you get the infection, your body already knows how to kill that antigen.

Edward Jenner saw that dairymaid gets affected by cow's version of smallpox, only on their hands, and then they don't suffer human smallpox.

He wants to prove that, without knowing what we call immunization now, and inoculate the boy.

option 3- They were exposed to cowpox, and the substance their body produced to fight cowpox also attacked smallpox.

Explanation: