December 1 marks the 20th observance of World AIDS Day, an annual worldwide event established to increase awareness
and education regarding human immunodeficiency virus (HIV) infection and acquired immunodeficiency syndrome (AIDS).
In 2007, an estimated 33.2 million persons worldwide are living with HIV; the number of deaths from AIDS in 2007 is expected
to total 2.1 million (1). In the United States, an estimated 1 million persons were living with HIV in 2003
(2); of these, approximately 25% were unaware of their infection and thus were at high risk for infecting others.
HIV testing remains a crucial component of HIV prevention strategies. Persons who know they are infected with HIV can
seek health care and protect their partners from becoming infected. In 2006, CDC issued new guidelines recommending routine
HIV testing of adults, adolescents, and pregnant women in health-care settings in the United States
(3). In addition, CDC recently provided funding to increase testing among populations disproportionately affected by HIV/AIDS. Additional
information regarding World AIDS Day and HIV prevention measures is available at
Use of trade names and commercial sources is for identification only and does not imply endorsement by the U.S. Department of
Health and Human Services.References to non-CDC sites on the Internet are
provided as a service to MMWR readers and do not constitute or imply
endorsement of these organizations or their programs by CDC or the U.S.
Department of Health and Human Services. CDC is not responsible for the content
of pages found at these sites. URL addresses listed in MMWR were current as of
the date of publication.
All MMWR HTML versions of articles are electronic conversions from ASCII text
into HTML. This conversion may have resulted in character translation or format errors in the HTML version.
Users should not rely on this HTML document, but are referred to the electronic PDF version and/or
the original MMWR paper copy for the official text, figures, and tables.
An original paper copy of this issue can be obtained from the Superintendent of Documents,
U.S. Government Printing Office (GPO), Washington, DC 20402-9371; telephone: (202) 512-1800.
Contact GPO for current prices.
**Questions or messages regarding errors in formatting should be addressed to