Between Wartime Penicillin's initial failure ( Chemistry) and its final success (Biology) stood a third party : the humanitarians

When I call Henry Dawson "Penicillin's Third Man", I am being more than ordinarily facetious.

Penicilin's problem was chemistry-besotted biologists, the solution was  biologically-pragmatic chemists and the connecting threat were a tiny group of humanitarian-minded clinicians.