Harvard also taught John Franklin Enders Nobel Laureate and “The Father of Modern Vaccines.” Granted they handed him his PhD in 1930, but he played a pivotal role in developing a measles vaccine and Salk was heavily dependent on his work when developing the polio vaccine. That’s rarefied air in terms of net benefit to humanity.

More recent examples aren’t as impressive by comparison, but graduates of Harvard school of medicine has collectively done a great deal of critical medical research. And of course many recent graduates have their best breakthroughs ahead of them.