The authors identified 2 guidelines about screening for HIV infection. In 2005 (and updated in 2007), the U.S. Preventive Services Task Force (USPSTF) recommended that doctors routinely ask patients about HIV risk factors, patients tell their doctors if they have a risk factor, and doctors recommend HIV testing for all adolescents and adults with a risk factor. The USPSTF also recommends screening all pregnant women. In 2006, the Centers for Disease Control and Prevention (CDC) recommended routine screening for all patients 13 to 64 years of age unless they lived in an area where HIV infection occurs in fewer than 1 of every 1000 residents. The CDC also recommends screening pregnant women and patients with tuberculosis or sexually transmitted diseases.