Antibiotics and Sanitation are tied at 4 each, with Germ Theory next at 3, Evidence based medicine at 2 and Vaccines 1. Not that big a spread, really.
But nobody went for Anesthesia, Chlorpromazine, Computers, DNA, Imaging,
Immunology, Oral rehydration therapy, The Pill, Risks of smoking, or Tissue Culture.
I have a feeling the DNA and maybe Computers would score better 10 years from now, but they haven't reached their importance potential yet.
Thanks everyone.
