He was given the Nobel Prize in 1945 in recognition, and in an interview shortly after, this is what he said: "The thoughtless person playing with penicillin treatment is morally responsible for the death of a man who succumbs to infection with a pencillin-resistant organism."
Gañou o Premio Nobel en 1945, e nunha entrevista  pouco despois, isto é o que dixo: "A persoa inconsciente que xogue cun tratamento de penicilina é moralmente responsable pola morte do home que sucumba á infección por un organismo resistente á penicilina."