Abstract
It is quite likely that more effective vaccines for respiratory diseases will be available in the near future. It is possible to produce vaccines against many arboviruses and enteroviruses. Improvements are being made in vaccines for smallpox, mumps, rabies, trachoma, influenza and measles. Effective new vaccines should be available soon for rubella and varicella, and there is reasonable hope for the future prophylaxis of viral hepatitis. A “cancer vaccine” effective against a significant variety of specific human oncogenous agents still seems improbable. A more likely approach to “biologic control” of cancer may lie in the use of vaccines against the “common” viruses that might contribute to damage caused by environmental carcinogens.