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Advancing HIV Prevention: New Strategies for a Changing Epidemic --- United States, 2003
In several U.S. cities, recent outbreaks of primary and secondary syphilis among men who have sex with men (MSM) (1) and increases in newly diagnosed human immunodeficiency virus (HIV) infections among MSM and among heterosexuals have created concern that HIV incidence might be increasing. In addition, declines in HIV morbidity and mortality during the late 1990s attributable to combination antiretroviral therapy appear to have ended. Until now, CDC has mainly targeted its prevention efforts at persons at risk for becoming infected with HIV by providing funding to state and local health departments and nongovernmental community-based organizations (CBOs) for programs aimed at reducing sexual and drug-using risk behavior. Some recent programs have focused on prevention efforts for persons living with HIV (2). Funding HIV-prevention programs for communities heavily affected by HIV has promoted community support for prevention activities. At the same time, these communities recognize the need for new strategies for combating the epidemic. In addition, the recent approval of a simple rapid HIV test in the United States creates an opportunity to overcome some of the traditional barriers to early diagnosis and treatment of infected persons. Therefore, CDC, in partnership with other U.S. Department of Health and Human Services agencies and other government agencies and nongovernment agencies will launch a new initiative in 2003, Advancing HIV Prevention: New Strategies for a Changing Epidemic.
Trends in HIV/AIDS Morbidity and Mortality
The first cases of acquired immunodeficiency syndrome (AIDS) were reported in the United States in June 1981, and the number of cases and deaths among persons with AIDS increased rapidly during the 1980s. During 1981--2001, an estimated 1.3--1.4 million persons in the United States were infected with HIV (3), and 816,149 cases of AIDS and 467,910 deaths were reported to CDC (4). During the late 1990s, after the introduction of combination antiretroviral therapy, the numbers of new AIDS cases and deaths among adults and adolescents declined substantially. From 1995 to 1998, the annual number of incident AIDS cases declined 38% from 69,242 to 42,832, and deaths from AIDS declined 63% from 51,670 to 18,823. The annual number of incident AIDS cases and deaths have remained stable since 1998, at approximately 40,000 and 16,000, respectively (4). The number of children in whom AIDS attributed to perinatal HIV transmission was diagnosed peaked in 1992 at 954 and declined 89% to 101 in 2001 (4).
Since the early 1990s, an estimated 40,000 new HIV infections have occurred annually in the United States. During 1999--2001, in the 25 states that had HIV reporting since 1994, the number of persons who had HIV infection newly diagnosed increased 14% among MSM and 10% among heterosexuals. The number of persons in the United States living with HIV continues to increase, and of an estimated 850,000--950,000 persons living with HIV, an estimated 180,000--280,000 (25%) persons are unaware of their serostatus (3).
Many HIV-infected persons do not get tested until late in their infection, and many persons who are tested do not return to learn their test results. In 2000, of an estimated two million CDC-funded tests for HIV, approximately 18,000 tests represented new HIV diagnoses. During 2000, of persons with positive tests for HIV, 31% did not return to learn their test results (CDC, unpublished data, 2000). Of 573 HIV-infected young MSM who were studied in six U.S. cities, 77% were unaware that they were infected (5). During 1994--1999, of 104,780 persons in whom HIV was diagnosed, AIDS was diagnosed in 43,089 (41%) persons within 1 year after their positive HIV test (6).
Reasons for HIV testing vary. In a study of 7,236 persons in whom HIV was newly diagnosed, the reason given most frequently (42%) for seeking the test was illness. Only 10% of HIV-infected men and 17% of HIV-infected women reported that they were tested primarily because the test was offered or recommended by a health-care facility or provider (CDC, unpublished data, 2002).
Many persons who learn that they are HIV infected adopt behaviors that might reduce the risk for transmitting HIV (7). In a study of 1,363 HIV-infected men and women, among the 69% who were sexually active during the preceding 12 months, 78%--96% used a condom at most recent anal or vaginal intercourse with a known HIV-negative partner, and 52%--86% reported condom use with a partner of unknown serostatus (CDC, unpublished data, 2002).
The development of new tests for HIV creates new prospects for expanding HIV testing to identify and treat HIV-infected persons earlier. The OraQuick® HIV rapid test (OraSure Technologies, Inc., Bethlehem, Pennsylvania) was approved by the Food and Drug Administration in November 2002 and categorized as a waived test under the Clinical Laboratory Improvement Amendments in January 2003. This simple, rapid test provides HIV results in 20 minutes, can be stored at room temperature, requires no special equipment, and can be performed outside clinical settings. Although the use of the OraQuick® test facilitates receipt of test results, HIV-positive test results will require confirmation by Western Blot or immunofluorescence assays.
Reported by: RS Janssen, MD, IM Onorato, MD, Div of HIV/AIDS Prevention--Surveillance and Epidemiology; RO Valdiserri, MD, TM Durham, MS, WP Nichols, MPA, EM Seiler, MPA, HW Jaffe, MD, National Center for HIV, STD, and TB Prevention, CDC.
The new initiative, Advancing HIV Prevention: New Strategies for a Changing Epidemic, is aimed at reducing barriers to early diagnosis of HIV infection and increasing access to quality medical care, treatment, and ongoing prevention services. The HIV initiative emphasizes the use of proven public health approaches to reducing the incidence and spread of disease. As with other sexually transmitted diseases (STDs) or any other public health problem, principles commonly applied to prevent disease and its spread will be used, including appropriate routine screening, identification of new cases, partner notification, and increased availability of sustained treatment and prevention services for those infected.
Stable HIV-associated morbidity and mortality, concerns about possible increases in HIV incidence, and the recent availability of a simple, rapid HIV test combined with strong prevention collaborations among communities heavily affected by HIV support the need to reassess and refocus some of CDC's HIV-prevention activities. An emphasis on greater access to testing and on providing prevention and care services for persons infected with HIV can reduce new infections and lead to reductions in HIV-associated morbidity and mortality (2,8). In addition, simplifying prenatal and other testing procedures can lead to more effective use of resources that CDC provides to prevent perinatal and other HIV transmission.
The initiative consists of four key strategies:
Reporting of HIV infections to public health authorities is now required in 49 states. In 2002, CDC initiated a pilot system to monitor HIV incidence. To track the impact of the new initiative, beginning in 2003, CDC is expanding this surveillance system by implementing a national behavioral surveillance system. In addition, CDC will monitor the implementation of these new activities through several systems, including new performance indicators for state and local health departments and CBOs.
Stable HIV morbidity and mortality, increased numbers of syphilis and HIV cases, and growing concern about increasing HIV incidence in some communities require new strategies to control the spread of HIV in the United States. Through Advancing HIV Prevention: New Strategies for a Changing Epidemic, every HIV-infected person should have the opportunity to be tested and have access to state-of-the-art medical care and to the prevention services needed to prevent HIV transmission.
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