Childbed for one, by washing hands before shoving them up in laboring women's vaginas.
Pressing to death by not torturing people
You can prevent a lot of Chrisomes and Teeth deaths (infants and toddlers and kindergartners) by routine vaccinations. Would prevent Jawfaln (tetanus) and Rising of the Lights (possibly whooping cough) as well.
Then of course there's basic safety standards and antibiotics.