What was Edward Jenner’s contribution to public health?

Answer one of the following questions based on watching the film, Unseen Enemies: Mankind’s Fight Against Infectious Disease.

In what ways are malaria and yellow fever similar?
What is generally considered the beginning of the modern era of Tuberculosis control?
Describe one of the filth diseases discussed in the film.
Who is Typhoid Mary?
What was Edward Jenner’s contribution to public health?