Mr. Reagan, although acknowledging that sexually active people should be told about condoms and other preventive practices, has stressed that educational efforts should include a strong emphasis on morality and on abstinence from sexual relations as the best preventive action.

Instead, preventing disease transmission by implementing preventive practices would likely be more cost-effective.

No preventive practices or cures have been found, and the cause remains a mystery, although questions have long been raised about the roles, if any, of environmental chemicals, viruses, trauma, drugs and heredity.

Follow the preventive practice used by many professional athletes of taping tender areas that are subject to repeated friction until you can build up a slight callus.

The extension of hormone-balance checkups, with other preventive practices, had reduced the overall incidence of sickness requiring hospitalization to the point where in the past ten years or so many thousands of hospital beds had ceased to be required.

Although they can be affected simultaneously by removing light sources, reducing overall intensity, or increasing the distance between a light source and an object, best preventive practice treats these types of light separately due to their differences.

"Our results raise questions about whether physicians apply preventive screening practices systematically, and whether they inaccurately tie race to problem drinking," wrote the author of the study, Dr. Kenneth J. Mukamal of Harvard.

Enlargement will, furthermore, lead to discrepancies between the preventive practices of the various countries in the Union.

This was the first truly preventive dental practice of its type and helped to pioneer preventive dentistry.