Many of them ended up at Fort Detrick, Maryland, participating in the top-secret Operation Whitecoat, which ran from 1954 to 1973.
virus
Restoring the Temple – To Arms with Your Immune System, Part I
Our powerful immune systems wipe out the invaders before they ever knew what hit them. Only when a microbe launches a particularly strong invasion (or the microbe itself is particularly virulent) does our immune system put its entire arsenal into play, stimulating symptoms such as tiredness, fever, runny nose, and coughs.