A recent issue of the newsletter "Recent Science" (not on line as far as I
know) has an article on Rene Dubos' participation in WWII and Cold War germ
warfare research.
Dubos never referred to this in his many autobiographical musings and was
generally thought of as a great humanist and critic of magic bullet,
non-preventative medicine.  The article ends by noting that unlike the A-bomb
project of Los Alamos, none of the people involved in bacterialogical warfare
have beat their breast saying "biologists have known sin" or "We have blood
on their hands" as did Oppenheimer and others.  In fact we know hardly
anything about who did participate, but, given that as eminent a researcher
and public figure as Dubos did, unknown to all, there are probably other
important medical and biological researchers who have particpated without
anyone outside the secret labs knowing.

Val Dusek