HIV/AIDS in Sub-Saharan Africa

Sub-Saharan Africa is the region most severely affected by the HIV/AIDS pandemic. Of the 40 million HIV infected individuals at the end of 2003, 26 million (65%) were living in the area. Reasons for the high infection rate include historical, political, economic, and cultural factors. The diversity of populations, combined with destitution, political and economic instability and hunger, has led to a number of strategies for combating the disease in Sub-Saharan Africa. These include voluntary counseling and testing, community involvement, facilitating behavior modifications, which include consistent and correct use of condoms, reduction in the number of sexual partners, increasing antiretroviral availability, and the involvement of non-governmental organizations in prevention, treatment, care, and support of the infected population. While Uganda has accomplished significant success through these mechanisms, other countries have not yet been able to control the disease. The populations requiring special attention include women of child-bearing age, who make 55% of the Sub-Saharan Africa's HIV infected population, children and the elderly. In this review, the current state of HIV/AIDS in Sub-Saharan Africa will be explored, in many cases referring to the situation in the southern African country of Malawi. Lessons will be highlighted and hopefully will contribute to the debate on HIV/AIDS and success of current and future prevention and control efforts.     

Progress, challenges, and new opportunities for the prevention of mother-to-child transmission of HIV under the US President's Emergency Plan for AIDS Relief

In June 2011, the Joint United Nations Programme on HIV/AIDS, the US President's Emergency Plan for AIDS Relief (PEPFAR), and other collaborators outlined a transformative plan to virtually eliminate pediatric AIDS worldwide. The ambitious targets of this initiative included a 90% reduction in new pediatric HIV infections and a 50% reduction in HIV-related maternal mortality--all by 2015. PEPFAR has made an unprecedented commitment to the expansion and improvement of prevention of mother-to-child HIV transmission (PMTCT) services globally and is expected to play a critical role in reaching the virtual elimination target. To date, PEPFAR has been instrumental in the success of many national programs, including expanded coverage of PMTCT services, an enhanced continuum of care between PMTCT and HIV care and treatment, provision of more efficacious regimens for antiretroviral prophylaxis, design of innovative but simplified PMTCT approaches, and development of new strategies to evaluate program effectiveness. These accomplishments have been made through collaborative efforts with host governments, United Nations agencies, other donors (eg, the Global Fund for AIDS, Tuberculosis, and Malaria), nongovernmental organizations, and private sector partners. To successfully meet the ambitious global targets to prevent new infant HIV infections, PEPFAR must continue to leverage the existing PMTCT platform, while developing innovative approaches to rapidly expand quality HIV services. PEPFAR must also carefully integrate PMTCT into the broader combination prevention agenda for HIV, so that real progress can be made toward an "AIDS-free generation" worldwide.     

Quality Care for People with HIV/AIDS: Patients’ Perspectives

Abstract

Purpose: To explore patient preferences to aid in the development of quality measures to assess quality of health care for people living with human immunodeficiency virus/acquired immunodeficiency disease (HIV/AIDS). Method: This study involved three 2-hour focus groups with 29 people living with HIV/AIDS in Portland, Oregon, and San Francisco, California. Eighteen quality of care indicators for HIV/AIDS health care were presented to each group and quantitative rankings were obtained. Aggregated weightings were used to rank and prioritize the quality measures for further exploration. Results: Participants identified 38 themes relevant to high-quality care for HIV/AIDS. Patients ranked the following candidate measures most important: effective relationship with provider, prevention of opportunistic infections, involvement in care and treatment decisions, being offered antiretroviral treatment, and access to health care services. We observed attitudinal differences among focus group participants that corresponded to gender and race/ethnicity. Conclusion: Participants favored quality information that rated the experience of care and outcome measures including indicators of access to services, standard treatments, and competence of the providers. Patient perspectives can inform the development of quality measures that are meaningful to consumers and can assist in the design of services that meet patients’ demographic and socioeconomic needs.     

Combination Prevention: New Hope for Stopping the Epidemic

HIV research has identified approaches that can be combined to be more effective in transmission reduction than any 1 modality alone: delayed adolescent sexual debut, mutual monogamy or sexual partner reduction, correct and consistent condom use, pre-exposure prophylaxis with oral antiretroviral drugs or vaginal microbicides, voluntary medical male circumcision, antiretroviral therapy (ART) for prevention (including prevention of mother to child HIV transmission [PMTCT]), treatment of sexually transmitted infections, use of clean needles for all injections, blood screening prior to donation, a future HIV prime/boost vaccine, and the female condom. The extent to which evidence-based modalities can be combined to prevent substantial HIV transmission is largely unknown, but combination approaches that are truly implementable in field conditions are likely to be far more effective than single interventions alone. Analogous to PMTCT, “treatment as prevention” for adult-to-adult transmission reduction includes expanded HIV testing, linkage to care, antiretroviral coverage, retention in care, adherence to therapy, and management of key co-morbidities such as depression and substance use. With successful viral suppression, persons with HIV are far less infectious to others, as we see in the fields of sexually transmitted infection control and mycobacterial disease control (tuberculosis and leprosy). Combination approaches are complex, may involve high program costs, and require substantial global commitments. We present a rationale for such investments and cite an ongoing research agenda that seeks to determine how feasible and cost-effective a combination prevention approach would be in a variety of epidemic contexts, notably that in a sub-Saharan Africa.     

The evolving role of HIV counseling and testing in resource-limited settings: HIV prevention and linkage to expanding HIV care access

The role of voluntary counseling and testing (VCT)of HIV in resource-limited settings has recently broadened from primarily that of a prevention intervention to its identification as the key entry point into expanding access to life-saving antiretroviral therapy, additional HIV-specific medical care, and other support services. To fulfill this expanded mandate, calls for routine counseling and testing in diverse health care settings, in addition to other innovative approaches to traditional VCT, are emerging. The efficacy and cost-effectiveness of traditional facility-based VCT with respect to risk-behavior reduction of HIV have been demonstrated rigorously in resource-limited settings. Additional research is needed urgently to evaluate the feasibility, acceptability, and effectiveness of streamlined counseling and testing interventions that seek to reach as many individuals as possible to meet dual prevention and treatment goals.     

Sexually transmitted infection services as a component of HIV care: findings of a demonstration project among HIV-infected women in Thailand

OBJECTIVES: As Thailand scales up its antiretroviral treatment program, the role of sexually transmitted infection (STI) services to prevent HIV transmission has not been addressed. We provided STI services for HIV-infected women as a component of HIV care and assessed STI prevalence and risk behaviors. METHODS: HIV-infected women attending an infectious disease clinic and an STI clinic in Bangkok were screened for the presence of genital ulcers by visual inspection, for gonorrhea and chlamydial infection by polymerase chain reaction, for trichomoniasis by wet mount, and for syphilis by serology. Women were asked about sexual risk behavior and use of antiretroviral treatment. Risk-reduction counseling, condoms, and STI treatment were provided. RESULTS: Two-hundred ten HIV-infected women at an infectious disease clinic (n = 150) and an STI clinic (n = 60) received STI services from July 2003 through February 2004. The prevalence for any STI was 8.0% at the infectious disease clinic and 30.0% at the STI clinic (P < 0.01). Of the 116 (55.2%) sexually active women, 42 (36.2%) reported sex without a condom during the last 3 months. Women receiving antiretroviral treatment reported condom use during last sex more often compared with those not receiving antiretroviral treatment (82.2% vs. 58.8%; P = 0.03). CONCLUSION: STIs and sexual risk behavior were common among these HIV-infected women, and STI services for HIV-infected persons have been expanded to more clinics in Thailand. Further analysis of HIV transmission risk is necessary for developing a national strategy for prevention of HIV transmission among HIV-infected persons.     

艾滋病流行病学

1　概述艾滋病是严重危害人群健康的疾病之一 ,其病死率极高。自 1981年美国首次报道艾滋病以来 ,艾滋病以传播迅速、病势凶险 ,预后差及危害严重而震惊世界。目前艾滋病已在全球广泛流行 ,严重危害着人类的健康。1 1　全球流行形势联合国艾滋病规划署和世界卫生组织最新报告显示 ,截至 1999年底全球ＨＩＶ感染者总数已超过5310万人 ,死于ＡＩＤＳ的人数已达 1880万人 (其中成人 150 0万、儿童 380万 )。 1999年全球新增加ＨＩＶ/ＡＩＤＳ 540万人 ,因艾滋病死亡 2 80万 ,平均每天新增加ＨＩＶ感染者 1 5万人。而且 95%以上的感染者集中在发…     

Building a durable response to HIV/AIDS: implications for health systems

The remarkable rise in investments for HIV control programs in 2003-2010 enabled an unprecedented expansion of access to HIV services in low-income and middle-income countries. By the end of 2010, more than 5.2 million people were receiving antiretroviral therapy (ART), which transformed HIV infection, once a death sentence, into a long-term illness. The rapid expansion in the number of persons receiving ART means that health systems must continue to provide acute life-saving care for those with advanced HIV/AIDS although also providing chronic care services to expanding cohorts of more stable patients who are doing well on ART. This expansion also means a transition from an emergency response to the epidemic, characterized by a public health approach, to a more integrated and durable approach to HIV prevention, care, and treatment services that fosters individualized care for those requiring long-term antiretroviral treatment. Yet most low-income and middle-income countries, which have weak health systems, are poorly prepared to make this transition. In this article, we highlight the challenges health systems face in developing a sustained and durable response to HIV/AIDS. The article analyses the readiness of health systems to combine rapid expansion of ART access with long-term treatment and continuity of care for a growing cohort of patients. We argue that effective management of a transition from an emergency AIDS response to long-term programatic strategies will require a paradigm shift that enables leveraging investments in HIV to build sustainable health systems for managing large cohorts of patients receiving ART although meeting the immediate needs of those who remain without access to HIV treatment and care.     

Information and communication technologies for adherence to antiretroviral treatment in adults with HIV/AIDS

IntroductionInformation and communication technologies support interventions directed at the prevention of HIV transmission and patient monitoring by promoting improved accessibility and quality of care.ObjectiveTo evaluate the efficacy of information and communication technologies in the adherence to antiretroviral treatment in adults with HIV/AIDS.MethodologySystematic review conducted from March to May of 2015 in three databases—the Cumulative Index to Nursing and Allied Health Literature (CINAHL); the Latin-American and Caribbean Literature in Health Sciences (LILACS/BIREME) and SCOPUS; and the Cochrane library and the Medical Literature Analysis and Retrieval System Online portal (MEDLINE/PubMed). The sample consisted of nine randomized clinical trials based on the use of information and communication technologies for adherence to antiretroviral treatment in adults with HIV/AIDS.ResultsThree studies analysed the use of a short message service – SMS – two phone calls, two alarm devices, one web-enabled Hand-held device and one web electronic intervention. Improvements in the levels of adherence in the group subjected to the intervention were identified in seven studies. The phone was the type of information and communication technology with proven efficacy with respect to adherence. It was used to make calls, as well as to send alert messages and reminders about taking medications. Pagers were not considered to be effective regarding adherence to antiretroviral therapy.ConclusionThe integrated use of information and communication technologies with standard care promotes increased access to care, strengthening the relationship between patients and health services, with the possibility of mitigating the difficulties experienced by people with HIV in achieving optimal levels of adherence to drug therapy.     

Trends in AIDS incidence and survival among racial/ethnic minority men who have sex with men,United States, 1990-1999

OBJECTIVES: We describe trends in AIDS incidence, survival, and deaths among racial/ethnic minority men who have sex with men (MSM). METHODS: We examined AIDS surveillance data for men diagnosed with AIDS from 1990 through 1999, survival trends from 1993 through 1997, and trends in AIDS incidence and deaths from 1996 to 1999, when highly active antiretroviral therapy (HAART) was introduced. RESULTS: The percentage of racial/ethnic minority MSM with AIDS increased from 33% of 26,930 men in 1990 to 54% of 17,162 men in 1999. From 1996 through 1998, declines in AIDS incidence were smallest among black MSM (25%, from 66.2 to 49.5 per 100,000) and Hispanic MSM (29%, from 39.3 to 27.8), compared with white MSM (41%, from 17.9 to 10.5). Declines in deaths of MSM with AIDS were also smallest among black MSM (53%, from 39.7 to 18.6 deaths per 100,000) and Hispanic MSM (61%, 21.6 to 8.4), compared with white MSM (63%, 12.3 to 4.5). Survival improved each year for all racial/ethnic groups but was poorest for black MSM in all years. CONCLUSIONS: Since the introduction of HAART, a combination of factors that include relatively higher infection rates in more recent years and differences in survival following AIDS diagnosis contribute to observed differences in trends in AIDS incidence and deaths among racial/ethnic minority MSM. Increased development of culturally sensitive HIV prevention services, and improved access to testing and care early in the course of disease are needed to further reduce HIV-related morbidity in racial/ethnic minority MSM.     

"What took you so long?" The impact of PEPFAR on the expansion of HIV testing and counseling services in Africa

HIV testing and counseling services in Africa began in the early 1990s, with limited availability and coverage. Fears of stigma and discrimination, complex laboratory systems, and lack of available care and treatment services hampered expansion. Use of rapid point-of-care tests, introduction of services to prevent mother-to-child transmission, and increasing provision of antiretroviral drugs were key events in the late 1990s and early 2000s that facilitated the expansion of HIV testing and counseling services. Innovations in service delivery included providing HIV testing in both clinical and community sites, including mobile and home testing. Promotional campaigns were conducted in many countries, and evolutions in policies and guidance facilitated expansion and uptake. Support from President's Emergency Plan for AIDS Relief and national governments, other donors, and the Global Fund for AIDS, Tuberculosis, and Malaria contributed to significant increases in the numbers of persons tested in many countries. Quality of both testing and counseling, limited number of health care workers, uptake by couples, and effectiveness of linkages and referral systems remain challenges. Expansion of antiretroviral treatment, especially in light of the evidence that treatment contributes to prevention of transmission, will require greater yet strategic coverage of testing services, especially in clinical settings and in combination with other high-impact HIV prevention strategies. Continued support from President's Emergency Plan for AIDS Relief, governments, and other donors is required for the expansion of testing needed to achieve international targets for the scale-up of treatment and universal access to knowledge of HIV status.     

AIDS mortality in a tertiary health institution: A four-year review

Africa contains 70% of adults and 80% of children living with AIDS in the world and has buried 75% of the 21.8 million worldwide who have died of AIDS since the epidemic began. Nigeria, the most populous country in Africa, has 5.8% of her adult population having HIV infection at the end of 2003. We reviewed the causes of death among AIDS patients in Aminu Kano Teaching Hospital Kano, Nigeria over four years. Four-hundred-fifty-five (9.9%) of the 4,574 adult medical admissions were due to HIV/AIDS-related diagnosis. HIV/AIDS admissions increased progressively from 45 cases in 2001 to 174 in 2004. HIV/AIDS caused 176 deaths over the period giving an HIV-related mortality of 38.7%. This also showed a gradual increase from 24 deaths in 2001 to 61 deaths in 2004. The most common causes of death were tuberculosis (33.4%), septicemia (23.8%), advanced HIV disease (9.1%), meningitis (7.4%), other pulmonary infections (5.1%) and Kaposi's sarcoma (4.5%). The present dismal situation of patients living with HIV/AIDS calls for enhanced strategies to decrease the mortality trend observed. With the introduction of affordable highly active antiretroviral therapy (HAART) in several centers in Nigeria, it is hoped that infected patients can be made to live longer.     

Implementation science for the prevention and treatment of HIV/AIDS

Implementation science is the scientific study of methods to promote the integration of research findings and evidence-based interventions into health care policy and practice and hence to improve the quality and effectiveness of health services and care. Implementation science is distinguished from monitoring and evaluation by its emphasis on the use of the scientific method. The origins of implementation science include operations research, industrial engineering, and management science. Today, implementation science encompasses a broader range of methods and skills including decision science and operations research, health systems research, health outcomes research, health and behavioral economics, epidemiology, statistics, organization and management science, finance, policy analysis, anthropology, sociology, and ethics. Examples of implementation science research are presented for HIV prevention (prevention of mother-to-child transmission of HIV, male circumcision) and HIV and drug use (syringe distribution, treating drug users with antiretroviral therapy and opioid substitution therapy). For implementation science to become an established field in HIV/AIDS research, there needs to be better coordination between funders of research and funders of program delivery and greater consensus on scientific research approaches and standards of evidence.     

Reducing HIV and AIDS in Adolescents: Opportunities and Challenges

Adolescents are critical to efforts to end the AIDS epidemic. Few national AIDS strategies explicitly program for children in their second decade of life. Adolescents (aged 10–19 years) are therefore largely invisible in global, regional, and country HIV and AIDS reports making it difficult to assess progress in this population. We have unprecedented knowledge to guide investment towards greater impact on HIV prevention, treatment, and care in adolescents, but it has not been applied to reach those most vulnerable and optimize efficiency and scale. The cost of this is increasing AIDS-related deaths and largely unchanged levels of new HIV infections in adolescents. An AIDS-free generation will remain out of reach if the global community does not prioritize adolescents. National AIDS responses must be accountable to adolescents, invest in strengthening and monitoring protective and supportive laws and policies and access for adolescents to high impact HIV interventions.     

Does antiretroviral therapy prevent HIV transmission to sexual partners?

The majority of HIV-1 infections are acquired sexually, and interventions to prevent sexual transmission are urgently needed to curb the growth of the HIV pandemic. The potential role of antiretroviral therapy in preventing sexual transmission of HIV is still emerging. Highly active antiretroviral therapy has been shown to decrease HIV RNA shedding in the genital tract, and its use among serodiscordant couples has been associated with reduced seroconversions in partners who are HIV negative. However, other studies have associated the use of antiretroviral therapy with increased HIV transmission risk behaviors. In this review, we explore the rationale for using highly active antiretroviral therapy to prevent sexual transmission of HIV including its role in prevention strategies at the population level, as well as the cost-effectiveness and potential limitations of this approach.     

重庆市艾滋病流行形势分析与防治策略研究

目的了解重庆市艾滋病流行趋势与特征,为艾滋病防治工作提供建议。方法收集1993—2009年重庆市艾滋病疫情资料与哨点监测数据,描述性分析HIV感染者年龄、性别、婚姻状况、职业、传播途径等的流行趋势,比较分析1999—2009年吸毒人群以及2006—2009年暗娼与男男性行为人群HIV感染率的变化趋势。结果重庆市累计报告HIV感染者7775例,近5年报告的病例数都超过了1000例,2009年经异性和同性性接触传播分别占26.6%和38.5%,50岁及以上年龄组所占的比例由2001年前的1.9%上升至2009年的17.4%。哨点监测发现静脉注射吸毒人群HIV由1999年的0.4%上升至2009年的6.4%,男男性行为人群HIV感染率由2006年的10.4%上升至2009年的19.0%,暗娼人群HIV感染率维持在0.5%以下。结论重庆市男男性行为人群、吸毒人群HIV感染率显著升高,加强针对上述人群的防控工作与HIV感染者的管理工作刻不容缓。     

The impact of the transmission dynamics of the HIV/AIDS epidemic on sexual behaviour: a new hypothesis to explain recent increases in risk taking-behaviour among men who have sex with men

Increases in sexually transmitted infections and related high-risk behaviours have been reported among men who have sex with men (MSM) in industrialised countries when effective antiretroviral therapy against HIV infection has become widely available, in the mid-nineties. The reasons for these increases are not fully understood and often conflicting. Prevention fatigue, relapses to unsafe sex, as well as optimism toward the risk of developing AIDS among people living with HIV are not unique to the era of antiretroviral therapy (ART). This has led researchers to highlight the need to investigate other potential reasons that could explain the increase in high-risk taking following the ART introduction. We put forward the hypothesis that the change in the transmission dynamics of the HIV/AIDS epidemic before and after the introduction of ART has contributed to this change in high-risk behaviour. It is suggested that a decline in sexual risk activities has occurred at the population-level following the initial spread of the HIV/AIDS epidemic because AIDS mortality and severe morbidity disproportionately depleted the pool of high-risk taking individuals. As a result, non-volitional changes may have occurred at the individual-level over time because the depletion of this pool of high-risk individuals made it more difficult for the remaining high-risk taking individuals to find partners to engage in risky sex with. Following its introduction, ART has facilitated the differential replenishment of the pool of individuals willing to engage in high-risk taking behaviours because ART reduces AIDS mortality, and morbidity. Consequently, high-risk taking individuals who had previously reduced their level of risky sex non-volitionally (i.e., as a result of the reduced availability of high-risk partners) were able to resume their initial high-risk practices as the pool of high-risk taking individuals replenished over time. Thus, a fraction of the recently reported increase in high-risk sexual activities may be secondary to the fact that those MSM who were unable to engage in their desired high-risky sexual activities (because of reduced availability) are now able to revert to them as the availability of men willing to engage in risky sexual behaviours increases partly due to ART. Therefore, we suggest that a fraction of the changes in individual behaviour are non-volitional and can be explained by a change in "sexual partner availability" due to the transmission dynamics of HIV/AIDS before and after ART. The hypothesis is formulated and explained using simple social network diagrams and the Theory of Planned Behaviour. We also discuss the implication of this hypothesis for HIV prevention.     

Family communication about HIV/AIDS and sexual behaviour among senior secondary school students in Accra,Ghana

Background

Sexually active adolescents in Ghana are increasingly at risk of HIV and other sexually transmitted infections. As a primary agent of socialization, the family can exert a strong influence on adolescent sexual behaviour. Therefore, to aid in the design and implementation of effective prevention programmes, it is important to understand the role of the family in influencing sexual behaviour among school-going adolescents.

Objectives

To evaluate the relationship between family communications about HIV/AIDS and sexual activity and condom use among school-going adolescents in Accra, Ghana.

Method

A sample of 894 students (56.9% girls, 43.1% boys; mean age = 17.4 years, SD = 1.40) at two senior secondary schools in Accra completed a modified version of the Youth Risk Behavior Survey (YRBS) questionnaire, a self-administered instrument developed by the Centers for Disease Control and Prevention. Analytical techniques utilized included logistic regression and chisquare.

Results

Twenty-five percent of the participants reported being sexually experienced, and 73.6% had talked about HIV/AIDS with parents or other family members. Of the sexually experienced students, 64.7% initiated first sexual intercourse by age 16; and 55.7% did not use a condom at last sexual intercourse. Bivariate analysis showed significant gender differences in sexual activity, condom use, and family communication about HIV/AIDS. Logistic regression analysis showed that student-family communication about HIV/AIDS was not associated with sexual activity. However, communication about HIV/AIDS between students and parents or other family members increased the odds of using a condom at last sexual intercourse.

Conclusions

The findings of this study suggest that prevention programmes that seek to educate Ghanaian school-going adolescents about sexual risk behaviour must strongly encourage communication about HIV/AIDS between students and family members.     

AIDS interfering with development progress

There is an high level of awareness about AIDS among the population of Uganda. Even so, the AIDS epidemic in the country continues to grow worse. From urban professionals to rural farmers, Ugandans in their most productive years are falling ill and dying from AIDS. These losses are being felt at the national and household levels. In a country where acquiring education and technical expertise come at a premium, the loss of professionals will have serious adverse effects upon economic and social gains thus far achieved. For many rural households, current levels of agricultural production may be threatened given the labor-intensive nature of such production. Coffee production by small-holders, accounting for more than 90% of the country's export earnings, will therefore be affected. This reduction in output will cause more economic strain. AIDS and its related secondary infections such as tuberculosis are placing heavy burdens upon Uganda's already overextended medical services. AIDS mortality now and in the future will also result in the creation of thousands of orphans for whom care will have to be provided. A multisectoral strategy has been adopted in the country to control HIV/AIDS. While control measures were once centered in the health sector, they have now expanded to the communication, rehabilitation, education, community services, defense, and economic planning sectors.     

Acceptance of a potential HIV/AIDS vaccine among minority women

PURPOSE: To explore the attitudes, opinions and concerns of minority women regarding acceptance of a potential HIV/ AIDS vaccine. METHODS: In-depth interviews were conducted with high-risk minority women (> or =18 years of age) attending an urban Atlanta health clinic specializing in sexually transmitted diseases, including HIV/AIDS prevention and treatment. Interviews were transcribed and content analyzed to identify common factors related to acceptance of an HIV/AIDS vaccine. RESULTS: Nine major themes were identified. These were general acceptance of an HIV/AIDS vaccine, concerns about the vaccine, vaccine knowledge, testing and research, provider recommendation, mistrust, alternative medicine, misperceptions and vaccine accessibility/availability. A strong theme emerged about the need for information from HIV/AIDS vaccine clinical trials, including the demographics of the studies' volunteer base, to inform decision-making about taking an HIV/AIDS vaccine in the future. CONCLUSIONS: Although fewer than half of the women indicated they would receive or recommend the vaccine, most agreed that development of a vaccine was an important endeavor. The findings of this study may assist in future efforts to determine how best to promote acceptance of an HIV/AIDS vaccine to minority women should one become available.