A 10-year follow-up of the National Cancer Act.

No decade has seen as great advances as the 1970's in the understanding of cancer and in treatment results. The discovery of the role of oncogens, of some viruses, carcinogenic chemicals, and life-style in carcinogenesis and the increased cure rates in childhood tumors, leukemias, lymphomas, and breast and testicular carcinomas are some examples. The National Cancer Act must be credited for these advances to an appreciable degree.