The National Center for HIV, STD, and TB Prevention is a branch of the U.S. Centers for Disease Control and Prevention (CDC). Their Web site provides information and updates on sexually transmitted diseases (STDs), human immunodeficiency virus (HIV), and tuberculosis (TB). You can also find fact sheets on these health topics.

The Planned Parenthood Federation of American provides comprehensive reproductive health care and consumer information about family planning, sexual health, and sexually transmitted diseases (STDs).

Sexuality Information and Education Council of the U.S. (SIECUS) develops, collects, and gives out information; promotes comprehensive education about sexuality, including sexually transmitted diseases; and advocates for the right of individuals to make responsible sexual choices.