The Public Health Service's most durable power was the microscope. Joseph Kinyoun's one-room laboratory of hygiene in 1887 grew into the NIH, and in Hamilton, Montana, scientists beat spotted fever at the cost of colleagues' lives and ran a World War II vaccine factory. The service's greatest creations grew into independent giants that outgrew it.
Sources differ on how many laboratory workers died at Hamilton. The vaccine reduced severity more than it gave full immunity, and some argue spinning off the NIH hollowed out its parent service.