Fewer than half of them will return to their original homes, say school officials, because of family histories that include crack addiction and AIDS.

New worries since 1972 include AIDS and the environment.

Big health challenges for the world include AIDS, other sexually transmitted diseases and tuberculosis, the report said.

The member groups' causes include labor, the environment, human rights, AIDS, global economics and women's rights.

This time they will include AIDS, defense of the Persian Gulf and arms control.

The list currently includes only AIDS and infectious tuberculosis.

Recent topics include AIDS and the use of condoms in prisons, overcrowding, computers and tips on getting a job.

Examples include cancer and AIDS, which induce a body wasting syndrome called cachexia.

Other examples include experimental AIDS, cancer and Alzheimer's disease vaccines.