But for all their frenzy of activity, they had still always avoided chaos, they had always proceeded from well-grounded hypotheses. They had not, as Avery said with contempt, poured material from one test tube into another. They had not done the wild things that had no basis in their understanding of the workings of the body. They had not given quinine or typhoid vaccine to influenza victims in the wild hope that because it worked against malaria or typhoid it might work against influenza. Others had done these things and more, but they had not.
