Jenner’s Theory of vaccination

Using Jenner’s Theory of vaccination, is it right to utilize immunization in order to prevent infections & diseases when it comes at a cost of adverse effects? (yes or no)

The essay is about the book Vaccination Against Smallpox by Edward Jenner, Essay topic is Using Jenner’s Theory of vaccination, is it right to utilize immunization in order to prevent infections & diseases when it comes at a cost of adverse effects? (yes or no) and should include 3 sources, one of them is the book itself and 2 more outside sources, It should be written in MLA format double spaced with 12 point Times New Roman Font and 1 inch margins. It should include a proper and effective thesis in the introduction, and in the body paragraphs include topic sentences, and include quotes and explanation of quotes
Wikipedia shouldn’t be used at all in the paper.