It is not strictly necessary to this argument to accept 1913 and 1955 as the two watershed years in order to understand that early in the century medical practice emerged into an era of scientific verification of its results. And later medical science itself became an alibi for the obvious damage caused by the medical professional. At the first watershed the desirable effects of new scientific discoveries were easily measured and verified. Germ-free water reduced infant mortality related to diarrhea, aspirin reduced the pain of rheumatism, and malaria could be controlled by quinine. Some traditional cures were recognized as quackery, but, more importantly, the use of some simple habits and tools spread widely. People began to understand the relationship between health and a balanced diet, fresh air, calisthenics, pure water and soap. New devices ranging from toothbrushes to Band-Aids and condoms became widely available. The positive contribution of modern medicine to individual health during the early part of the twentieth century can hardly be questioned.