Incarceration of people living with HIV/AIDS: implications for treatment-as-prevention

Implementing Preexposure Prophylaxis for HIV Prevention in a Statewide Correctional System in the United States

HIV disproportionately affects populations experiencing incarceration. Preexposure prophylaxis (PrEP) is an effective approach to preventing HIV acquisition among populations at increased risk of acquiring HIV. Yet few, if any, efforts have been made to offer PrEP in correctional settings. Beginning in November 2019, the Rhode Island Department of Corrections (RIDOC) implemented a systemwide PrEP initiation program with linkage to PrEP care in the community upon reentry. Incarcerated individuals identified as being potentially at increased risk of HIV acquisition during standard clinical screenings and medical care were referred to a PrEP care provider for potential PrEP initiation. Of the 309 people who met with a PrEP care provider, 35% (n = 109; 88 men, 21 women) agreed to initiate PrEP while incarcerated. Clinical testing and evaluation were completed for 82% (n = 89; 69 men, 20 women) of those who agreed to initiate PrEP. Of those, 54% (n = 48; 29 men, 19 women) completed the necessary clinical evaluation to initiate PrEP, were determined to be appropriate candidates for PrEP use, and had the medication delivered to a RIDOC facility for initiation. Only 8 people (4 men, 4 women) were successfully linked to a PrEP care provider in the community after release. The RIDOC experience demonstrates notable levels of PrEP interest and moderate levels of PrEP uptake among this population. However, PrEP engagement in care after release and persistence in taking PrEP when in the community were relatively poor, indicating a need to better understand approaches to overcoming barriers to PrEP care in this unique setting.

Odds of HIV among incarcerated drug users: a systematic review and meta-analysis of Asian countries

Background

HIV makes up a large portion of infectious diseases globally. People injecting drugs in prisons are at high risk for contracting HIV infection. Prisons house ~10.2 million people globally, making them a high-risk setting for HIV transmission. This systematic review summarizes the available data on the odds of developing HIV infection among imprisoned people who inject drugs (PWIDs) in Asian regions.

Methods

The authors electronically assessed published studies from January, 2000 to December, 2022, including studies that investigated the odds of HIV in imprisoned PWIDs. We extensively searched PubMed, ERIC, and Cochrane Central and Google Scholar with no constraints in language or time. All the observational studies evaluating the chances of HIV in Asian prisoners with an exposure group of PWIDs and a control group of non-injecting-drug users were included in our analysis.

Results

The databases search yielded 254 potential studies, 10 observational studies of which having a total of 17 333 participants were included. A low or moderate risk of bias was reported in all the studies except one case-control. The pooled analysis showed a significant association between PWIDs and the chances of contracting HIV infection (Odds ratio=6.40; 95% CI=3.89-10.52; P<0.00001; I2=53%).

Conclusion

This study found a vital correlation between injecting-drug usage during imprisonment and HIV transmission speed. The results of this meta-analysis support the need to prevent HIV and conducting treatment programs in high-risk settings like prisons.

Self-Reported Adherence to Antiretroviral Therapy (ART) Among Women Engaged in Commercial Sex Work in Southern Uganda

We examined the correlates of self-reported adherence to antiretroviral therapy (ART) among women engaged in commercial sex work (WESW) in Uganda. We used baseline data from a longitudinal study, which recruited 542 WESW in Southern Uganda. We used nested regression models to determine the individual and family, and economic level correlates of self-reported adherence. Study findings show that older age (OR = 1.07, 95% CI = 1.013, 1.139), secondary education (OR = 2.01, 95% CI = 1.306, 3.084), large household size (OR = 1.08, 95% CI = 1.020, 1.136), high family cohesion (OR = 1.06, 95% CI = 1.052, 1.065), and high financial self-efficacy (OR = 1.07, 95% CI = 1.006, 1.130) were associated with good self-reported adherence to ART. Married women (OR=-0.39, 95% CI = 0.197, 0.774), depression (OR = 0.85, 95% CI = 0.744, 0.969), alcohol use (OR = 0.72, 95% CI = 0.548, 0.954), ever been arrested (OR = 0.58, 95% CI = 0.341, 0.997), and high household assets ownership (OR = 0.48, 95% CI = 0.313, 0.724) were associated with poor self-reported adherence to ART. Findings suggest a need to adopt a multi-level approach to address gaps in ART adherence among WESW.

HIV and Incarceration: Implications for HIV-Positive People Who Use Illicit Drugs During a Seek, Test, Treat, and Retain Initiative in Canada

People who use illicit drugs (PWUD) face increased exposure to the criminal justice system and disproportionate burdens of HIV infection. This article investigated the effects of incarceration on HIV cascade of care-related measures in a setting with a community-wide seek, test, treat, and retain (STTR) initiative. Using a multivariable logistic regression analysis of 935 HIV-positive PWUD between 2005 and 2017, this article showed a negative relationship between periods of incarceration and two measures of engagement in clinical care for HIV among PWUD: recent dispensation of antiretroviral therapy and suppression of HIV viral load. These findings suggest the benefits of STTR-based efforts are limited by exposure to the criminal justice system and highlight the need for additional supports for PWUD with HIV exposed to the criminal justice system.

Estimating the minimum antiretroviral adherence required for plasma HIV-1 RNA viral load suppression among people living with HIV who use unregulated drugs

OBJECTIVES

Owing to advances in antiretroviral therapy (ART), we re-examined minimum ART adherence levels necessary to achieve sustained HIV-1 viral load (VL) suppression among people with HIV who use drugs (PHIV-PWUD).

DESIGN AND METHODS

We used data from ACCESS, a community-recruited prospective cohort of PHIV-PWUD in Vancouver, Canada. We calculated adherence using the proportion of days of ART dispensed in the year before each VL measurement. We used generalized linear mixed-effects models to identify adherence- and ART regimen-related correlates of VL suppression (<200 copies/ml). We employed probit regression models and generated dose-response curves to estimate the minimum adherence level needed to produce VL suppression in 90% of measures, stratified by regimen and calendar-year.

RESULTS

Among 837 ART-exposed PHIV-PWUD recruited between 1996 and 2017, the overall estimated adherence level necessary to achieve 90% VL suppression was 93% (95% confidence interval [CI]: 90-96). This differed by regimen: 69% (95% CI: 45-92) for integrase inhibitor (INSTI)-, 96% (95% CI: 92-100) for boosted protease inhibitor (bPI)-, and 98% (95% CI: 91-100) for non-nucleoside reverse transcriptase inhibitor-based regimens. In multivariable analysis, INSTI-based regimens were positively associated with VL suppression (vs. bPIs), while un-boosted PIs and other regimens were negatively associated. We observed a decreasing temporal trend of estimated adherence necessary for 90% VL suppression, dropping to 64% (95% CI: 50-77) during 2016-2017.

CONCLUSION

Although high levels of ART adherence were necessary to achieve consistent VL suppression, the minimum necessary adherence levels decreased over time. Overall, INSTI-based regimens performed the best, suggesting that they should be preferentially prescribed to PHIV-PWUD.

Recent Incarceration and Other Correlates of Psychological Distress Among African American and Latino Men Who Have Sex with Men

There is a dearth of research on the intersection of incarceration and psychological distress among men who have sex with men including African American (AAMSM) and Latino MSM (LMSM), populations which bear a large burden of HIV in the U.S. Recent incarceration is an important context to examine psychological distress given the critical implications it has on health outcomes. Using baseline data from the Latino and African American Men's Project (LAAMP), a multi-site randomized HIV behavioral intervention trial, this paper examined the association between previous incarceration within the past three months (i.e., recent incarceration) and psychological distress in the past four weeks, assessed by the Kessler Psychological Distress Scale (K10). Among 1482 AAMSM and LMSM (AAMSM: 911, LMSM: 571), we found 768 (52%) were previously incarcerated, but not in past three months and 138 (9.3%) had been recently incarcerated. After adjusting for race, education, access to resources, current living arrangement, HIV status, and substance use, participants who had been recently incarcerated were more likely to have mild psychological distress i.e., K10 score 20-24 (aRRR:1.43, 95% CI 1.20, 1.71) or severe psychological distress, i.e., K10 score > 30 (aRRR: 1.89, 95% CI 1.22, 2.93) in the past four weeks than those never incarcerated and those previously incarcerated, but not in past three months. Our findings have implications for mental health and HIV prevention services for AAMSM and LMSM with previous incarceration within the past three months.

HIV-related stigma and uptake of antiretroviral treatment among incarcerated individuals living with HIV/AIDS in South African correctional settings: A mixed methods analysis

Background

Stigma affects engagement with HIV healthcare services. We investigated the prevalence and experience of stigma among incarcerated people living with HIV (PLHIV) in selected South African correctional settings during roll-out of universal test and treat.

Methods

A cross-sectional mixed-methods study design included 219 incarcerated PLHIV and 30 in-depth interviews were conducted with four different types of PLHIV. HIV-related stigma was assessed through survey self-reporting and during the interviews. A descriptive analysis of HIV-related stigma was presented, supplemented with a thematic analysis of the interview transcripts.

Results

ART uptake was high (n = 198, 90.4%) and most reported HIV-related stigma (n = 192, 87.7%). The intersectional stigma occurring due to individual and structural stigma around provision of healthcare in these settings mostly contributed to perceived stigma through involuntary disclosure of HIV status. Interpersonal and intrapersonal factors led to negative coping behaviours. However, positive self-coping strategies and relationships with staff encouraged sustained engagement in care.

Conclusion

We encourage continuous peer support to reduce stigmatization of those infected with HIV and whose status may be disclosed inadvertently in the universal test and treat era.

We the People: A Black Strategy to End the HIV Epidemic in the United States of America

The two previous United States presidential administrations implemented efforts to combat HIV/AIDS, recently leading to a plan to end this epidemic by 2030. Although the plan outlines a biomedical framework of key areas to address, it does not prioritize the core systemic and social issues that have caused the disease to devastate Black communities. The Black AIDS Institute (BAI) responded directly to this gap with "We the People: A Black Strategy to End HIV." BAI connected with Black community members across the country and conducted key informant interviews, held town hall meetings, and hosted a community forum in the U.S. Conference on AIDS. Based on this extensive community-level input, BAI, along with a diverse group of social justice partners, finalized the plan's strategic direction and recommendations. The efforts culminated in the "We the People" framework's four key pillars directly informing all of BAI's policy work, to include radically reimagining housing, health care, and criminalization systems that perpetuate the HIV/AIDS crisis among Black Americans. "We the People" outlines a clear path to engage policymakers and ensure all communities can effectively access and utilize the treatment and prevention advances that have the potential to soon end this epidemic..

A systematic review and meta-analyses on initiation, adherence and outcomes of antiretroviral therapy in incarcerated people

BACKGROUND

Incarcerated people are at increased risk of human immunodeficiency virus (HIV) infection relative to the general population. Despite a high burden of infection, HIV care use among prison populations is often suboptimal and varies among settings, and little evidence exists explaining the discrepancy. Therefore, this review assessed barriers to optimal use of HIV care cascade in incarcerated people.

METHODS

Quantitative and qualitative studies investigating factors affecting linkage to care, ART (antiretroviral therapy) initiation, adherence and/or outcomes among inmates were systematically searched across seven databases. Studies published in English language and indexed up to 26 October 2018 were reviewed. We performed a narrative review for both quantitative and qualitative studies, and meta-analyses on selected quantitative studies. All retrieved quantitative studies were assessed for risk of bias. Meta-analyses were conducted using RevMan-5 software and pooled odds ratios were calculated using Mantel-Haenszel statistics with 95% confidence interval at a p<0.05. The review protocol has been published at the International Prospective Register of Systematic Reviews (PROSPERO; Number: CRD42019135502).

RESULTS

Of forty-two studies included in the narrative review, eight were qualitative studies. Sixteen of the quantitative studies were eligible for meta-analyses. The narrative synthesis revealed structural factors such as: a lack of access to community standard of HIV care, particularly in resource limited countries; loss of privacy; and history of incarceration and re-incarceration as risk factors for poor HIV care use in prison populations. Among social and personal characteristics, lack of social support, stigma, discrimination, substance use, having limited knowledge about, and negative perception towards ART were the main determinants of suboptimal use of care in incarcerated people. In the meta-analyses, lower odds of ART initiation was noticed among inmates with higher baseline CD4 count (CD4 ≥500celss/mm3) (OR = 0.37, 95%CI: 0.14-0.97, I2 = 43%), new HIV diagnosis (OR = 0.07, 95%CI: 0.05-0.10, I2 = 68%), and in those who lacked belief in ART safety (OR = 0.32, 95%CI: 0.18-0.56, I2 = 0%) and efficacy (OR = 0.31, 95%CI: 0.17-0.57, I2 = 0%). Non-adherence was high among inmates who lacked social support (OR = 3.36, 95%CI: 2.03-5.56, I2 = 35%), had low self-efficiency score (OR = 2.50, 95%CI: 1.64,-3.80, I2 = 22%) and those with depressive symptoms (OR = 2.02, 95%CI: 1.34-3.02, I2 = 0%). Lower odds of viral suppression was associated with history of incarceration (OR = 0.40, 95%CI: 0.35-0.46, I2 = 0%), re-incarceration (OR = 0.09, 95%CI: 0.06-0.13, I2 = 64%) and male gender (OR = 0.55, 95%CI: 0.42-0.72, I2 = 0%). Higher odds of CD4 count <200cells/mm3 (OR = 2.01, 95%CI: 1.62, 2.50, I2 = 44%) and lower odds of viral suppression (OR = 0.20, 95%CI: 0.17-0.22, I2 = 0%) were observed during prison entry compared to those noticed during release.

CONCLUSION

Given the high HIV risk in prison populations and rapid movements of these people between prison and community, correctional facilities have the potential to substantially contribute to the use of HIV treatment as a prevention strategy. Thus, there is an urgent need for reviewing context specific interventions and ensuring standard of HIV care in prisons, particularly in resource limited countries.

Violence and other social structural factors linked to incarceration for women living with HIV in Metro Vancouver: need for trauma-informed HIV care in prisons and post-Release

Despite women living with HIV (WLWH) being disproportionately criminalized and overrepresented within correctional facilities, there remains limited longitudinal research with WLWH examining factors that make WLWH vulnerable to incarceration. Data are drawn from SHAWNA (Sexual health and HIV/AIDS: Women's Longitudinal Needs Assessment), a community-based research cohort with cisgender and transgender WLWH in Metro Vancouver, Canada. Multivariable logistic regression using generalized estimating equations (GEE) and an exchangeable working correlation matrix was used to prospectively model correlates of recent incarceration exposure over a seven-year period. Amongst 289 WLWH, 76% had been incarcerated in their lifetime, and 17% had experienced recent incarceration. In multivariable GEE analysis, younger age (AOR: 0.92 per year older, 95% CI: 0.89-0.96), recent homelessness (AOR: 2.81, 95% CI: 1.46-5.41), recent gender-based (physical and/or sexual) violence (AOR: 2.26, 95% CI: 1.20-4.22) and recent opioid use (AOR: 1.83, 95% CI: 1.00-3.36), were significantly associated with recent incarceration. Lifetime exposure to gender-based violence by police (AOR: 1.97, CI: 0.97-4.02) was marginally associated with increased odds of recent incarceration. This research suggests a critical need for trauma-informed interventions for WLWH during and following incarceration. Interventions must be gender specific, include housing and substance use supports, and address the impact of gender-based violence.

Decreasing HIV transmissions to African American women through interventions for men living with HIV post-incarceration: An agent-based modeling study

Background

Incarceration and HIV disproportionately impact African American communities. The mass incarceration of African American men is hypothesized to increase HIV acquisition risk for African American women. Interventions optimizing HIV care engagement and minimizing sexual risk behaviors for men living with HIV post-incarceration may decrease HIV incidence.

Methods

Using an agent-based model, we simulated a sexual and injection drug using network representing the African American population of Philadelphia. We compared intervention strategies for men living with HIV post-incarceration by the number of averted HIV transmissions to women within the community. Three interventions were evaluated: a 90-90-90 scenario scaling up HIV testing, ART provision, and ART adherence; a behavioral intervention decreasing sexual risk behaviors; and a combination intervention involving both.

Results

The status quo scenario projected 2,836 HIV transmissions to women over twenty years. HIV transmissions to women decreased by 29% with the 90-90-90 intervention, 23% with the behavioral intervention, and 37% with both. The number of men living with HIV receiving the intervention needed in order to prevent a single HIV transmission ranged between 6 and 10.

Conclusion

Interventions to improve care engagement and decrease sexual risk behaviors post-incarceration for men living with HIV have the potential to decrease HIV incidence within African American heterosexual networks.

Use of an mHealth Intervention to Improve Engagement in HIV Community-Based Care Among Persons Recently Released from a Correctional Facility in Washington, DC: A Pilot Study

We examined the preliminary effectiveness of a computerized counseling session plus post-incarceration text messaging intervention (CARE + Corrections) to support ART adherence and linkage/engagement in community care among recently incarcerated persons with HIV in Washington, D.C. Recently incarcerated persons with HIV ≥ 18 years old were recruited from the D.C. jail or community outreach and randomized to CARE + Corrections or control arm. Participants completed assessments at baseline, 3-months and 6-months. Multivariable random effects modeling identified predictors of suppressed viral load (≤ 200 copies/mL) and engagement in HIV care at 6 months. Participants (N = 110) were aged 42 (IQR 30-49); 58% male, 24% female, 18% transgender, 85% Black, and lifetime incarceration was a median of 7 years (IQR 2-15). More controls had a regular healthcare provider at baseline. Although not statistically significant, intervention participants had increased odds of viral suppression versus controls at 6 months (AOR 2.04; 95% CI 0.62, 6.70). Those reporting high ART adherence at baseline had higher odds of viral suppression at follow-up (AOR 10.77; 95% CI 1.83, 63.31). HIV care engagement was similar between the two groups, although both groups reported increased engagement at 6 months versus baseline. We observed a positive but non-significant association of viral suppression in the CARE + Corrections group, and care engagement increased in both groups after 6 months. Further attention to increasing viral suppression among CJ-involved persons with HIV upon community reentry is warranted.

HIV Treatment Cascade by Housing Status at Enrollment: Results from a Retention in Care Cohort

Though housing instability is linked to poor HIV health outcomes, studies that assess the HIV treatment cascade by housing status are limited. Using data from a multi-site Retention in Care initiative we constructed HIV treatment cascades for participants (n = 463) of five grantee sites. We found no significant differences in viral suppression at follow-up among participants who were unstably housed at enrollment (49%) as compared to those who were stably housed at enrollment (54%). Among participants with available data at 6- or 12-month follow-up, 94% were engaged in care, 90% were retained in, 94% were on ART, and 71% had suppressed viral load. Some site-level differences were noted; at two of the sites participants who were stably housed were more likely to be retained in care and on ART. Overall, findings demonstrated that participants moved successfully through the HIV treatment cascade regardless of housing status at enrollment, suggesting that evidence-based support and services to help people living with HIV/AIDS can help mitigate barriers to engagement in care associated with lack of stable housing.

Implementation of a Socio-structural Demonstration Project to Improve HIV Outcomes Among Young Black Men in the Deep South

BACKGROUND

We describe the background, rationale, intervention components, and formative results of a demonstration project aimed to ameliorate five socio-structural barriers to HIV services for young Black men aged 18-29 living with and at risk for HIV in Louisiana.

METHODS

The interventions and activities consisted of (1) five person-centered approaches to enhance linkage to HIV services and improve socio-economic outcomes; (2) the implementation of systematic mystery shopping tests to document instances of housing discrimination; (3) the development and implementation of a multi-prong communications campaign to increase knowledge about the signs of housing discrimination and community resources among young Black men who have sex with men (YBMSM); (4) the integration of HIV/STI services and lesbian, gay, bisexual, and trans (LGBT)-inclusive events on Historically Black Colleges and Universities (HBCUs); and (5) the development of a safe space for YBMSM. A multi-method approach was used to evaluate the outcomes of the different interventions.

RESULTS

The majority (62%) of participants living with HIV were linked to HIV care and 49% had achieved viral suppression. More than 40% of participants were employed during the project. Thirty-seven percent (37%) of the mystery shopping tests showed definite or possible signs of housing discrimination. The housing campaign's duration was limited with unknown long-term impact among YBMSM. Fifteen cases of syphilis were identified during two HBCU events. A safe space was specifically created for YBMSM at a community-based organization.

CONCLUSION

Multi-component holistic health interventions are needed to improve HIV outcomes and curb the high HIV rates among young Black men, particularly YBMSM in the United States and the Deep South.

Identifying Which Place Characteristics are Associated with the Odds of Recent HIV Testing in a Large Sample of People Who Inject Drugs in 19 US Metropolitan Areas

This exploratory analysis investigates relationships of place characteristics to HIV testing among people who inject drugs (PWID). We used CDC's 2012 National HIV Behavioral Surveillance (NHBS) data among PWID from 19 US metropolitan statistical areas (MSAs); we restricted the analytic sample to PWID self-reporting being HIV negative (N = 7477). Administrative data were analyzed to describe the 1. Sociodemographic Composition; 2. Economic disadvantage; 3. Healthcare Service/Law enforcement; and 4. HIV burden of the ZIP codes, counties, and MSAs where PWID lived. Multilevel models tested associations of place characteristics with HIV testing. Fifty-eight percent of PWID reported past-year testing. MSA-level per capita correctional expenditures were positively associated with recent HIV testing among black PWID, but not white PWID. Higher MSA-level household income and imbalanced sex ratios (more women than men) in the MSA were associated with higher odds of testing. HIV screening for PWID is suboptimal (58%) and needs improvement. Identifying place characteristics associated with testing among PWID can strengthen service allocation and interventions in areas of need to increase access to HIV testing.

Making the Connection: Using Videoconferencing to Increase Linkage to Care for Incarcerated Persons Living with HIV Post-release

Incarcerated persons living with HIV (PLWH) have relatively high levels of HIV care engagement and antiretroviral therapy adherence during incarceration, but few are able to maintain these levels upon reentry into the community. In Louisiana, PLWH nearing release from prisons were offered video conferences with case managers housed in community based organizations aimed at facilitating linkage to care in the community. Of the 144 persons who received a video conference during the study period, 74.3% had linked to HIV care in the community within 90 days after release. Compared to the comparison group (n = 94), no statistically significant difference in linkage rate was detected (p > 0.05). Nonetheless, the video conference supplement was positively received by clients and case management agencies in the community and the lack of a detectable impact may be due to early difficulties in intervention delivery and study design limitations. Further study is needed to determine the value of the video conferencing supplement in other settings.

Potential drivers of HIV acquisition in African-American women related to mass incarceration: an agent-based modelling study

Background

The United States has the highest incarceration rate in the world. Incarceration can increase HIV risk behaviors for individuals involved with the criminal justice system and may be a driver of HIV acquisition within the community.

Methods

We used an agent-based model to simulate HIV transmission in a sexual-contact network representing heterosexual African American men and women in Philadelphia to identify factors influencing the impact of male mass incarceration on HIV acquisition in women. The model was calibrated using surveillance data and assumed incarceration increased the number of sexual contacts and decreased HIV care engagement for men post-release. Incarceration of a partner increased the number of sexual contacts for women. We compared a counterfactual scenario with no incarceration to scenarios varying key parameters to determine what factors drove HIV acquisition in women.

Results

Setting the duration of male high-risk sexual behavior to two years post-release increased the number of HIV transmissions to women by more than 20%. Decreasing post-release HIV care engagement and increasing HIV acquisition risk attributable to sexually transmitted infections (STIs) also increased the number of HIV transmissions to women. Changing the duration of risk behavior for women, the proportion of women engaging in higher risk behavior, and the relative risk of incarceration for HIV-infected men had minimal impact.

Conclusion

The mass incarceration of African American men can increase HIV acquisition in African American women on a population-level through factors including post-release high-risk behaviors, disruption of HIV care engagement among formerly incarcerated men, and increased STI prevalence. These findings suggest that the most influential points of intervention may be programs seeking to reduce male risk behaviors and promote HIV care engagement post-release, as well as STI testing and treatment programs for recently incarcerated men, as well as women with incarcerated partners.

Electronic supplementary material

The online version of this article (10.1186/s12889-018-6304-x) contains supplementary material, which is available to authorized users.

Retention in HIV care during the 3 years following release from incarceration: A cohort study

BACKGROUND

Sustained retention in HIV care (RIC) and viral suppression (VS) are central to US national HIV prevention strategies, but have not been comprehensively assessed in criminal justice (CJ) populations with known health disparities. The purpose of this study is to identify predictors of RIC and VS following release from prison or jail.

METHODS AND FINDINGS

This is a retrospective cohort study of all adult people living with HIV (PLWH) incarcerated in Connecticut, US, during the period January 1, 2007, to December 31, 2011, and observed through December 31, 2014 (n = 1,094). Most cohort participants were unmarried (83.7%) men (77.0%) who were black or Hispanic (78.1%) and acquired HIV from injection drug use (72.6%). Prison-based pharmacy and custody databases were linked with community HIV surveillance monitoring and case management databases. Post-release RIC declined steadily over 3 years of follow-up (67.2% retained for year 1, 51.3% retained for years 1-2, and 42.5% retained for years 1-3). Compared with individuals who were not re-incarcerated, individuals who were re-incarcerated were more likely to meet RIC criteria (48% versus 34%; p < 0.001) but less likely to have VS (72% versus 81%; p = 0.048). Using multivariable logistic regression models (individual-level analysis for 1,001 individuals after excluding 93 deaths), both sustained RIC and VS at 3 years post-release were independently associated with older age (RIC: adjusted odds ratio [AOR] = 1.61, 95% CI = 1.22-2.12; VS: AOR = 1.37, 95% CI = 1.06-1.78), having health insurance (RIC: AOR = 2.15, 95% CI = 1.60-2.89; VS: AOR = 2.01, 95% CI = 1.53-2.64), and receiving an increased number of transitional case management visits. The same factors were significant when we assessed RIC and VS outcomes in each 6-month period using generalized estimating equations (for 1,094 individuals contributing 6,227 6-month periods prior to death or censoring). Additionally, receipt of antiretroviral therapy during incarceration (RIC: AOR = 1.33, 95% CI 1.07-1.65; VS: AOR = 1.91, 95% CI = 1.56-2.34), early linkage to care post-release (RIC: AOR = 2.64, 95% CI = 2.03-3.43; VS: AOR = 1.79; 95% CI = 1.45-2.21), and absolute time and proportion of follow-up time spent re-incarcerated were highly correlated with better treatment outcomes. Limited data were available on changes over time in injection drug use or other substance use disorders, psychiatric disorders, or housing status.

CONCLUSIONS

In a large cohort of CJ-involved PLWH with a 3-year post-release evaluation, RIC diminished significantly over time, but was associated with HIV care during incarceration, health insurance, case management services, and early linkage to care post-release. While re-incarceration and conditional release provide opportunities to engage in care, reducing recidivism and supporting community-based RIC efforts are key to improving longitudinal treatment outcomes among CJ-involved PLWH.

Cumulative plasma HIV burden disparities among adults in HIV care: implications for HIV transmission in the era of treatment as prevention

OBJECTIVE

To characterize disparities in cumulative plasma HIV burden in a sample of adults accessing HIV care in San Francisco, California.

DESIGN

Observational cohort and supplemental HIV surveillance data.

METHODS

Data from the San Francisco Medical Monitoring Project 2012-2014 cycles and HIV surveillance data were used to create an analytic cohort followed for 2 years. Matched HIV viral load test results from HIV surveillance were used to create five viral outcome measures: any unsuppressed viral load (>200 copies/ml), any transmittable viral load (>1500 copies/ml), person-time spent unsuppressed, person-time spent transmittable, and 2-year viremia copy-years, a measure of cumulative plasma HIV burden. Rao-Scott chi-squares and analysis of variance examined differences in durable suppression and mean percentage time spent unsuppressed and transmittable. Weighted linear regression was used to describe differences in cumulative HIV burden.

RESULTS

Adults receiving HIV care spent approximately 12% of the 2-year time period with an unsuppressed viral load and approximately 7% of the time at a transmittable viral level. Factors independently associated with higher cumulative HIV viremia in an adjusted model included trans women identity, younger age, lower CD4 cell count, and a history of homelessness, incarceration, not taking ART, and nonadherence to ART.

CONCLUSION

Although 95% of the cohort of adults in HIV care in San Francisco self-reported ART use during MMP interview, they spent on average almost 1 month per year at a transmittable viral level. We identified characteristics of those who were more likely to have higher viral burden, highlighting priorities for resource allocation to reduce onward HIV transmission.

Substance Use and Adherence to Antiretroviral Therapy: What Is Known and What Is Unknown

PURPOSE OF REVIEW

People who use drugs face multiple challenges to achieve optimal HIV treatment outcomes. This review discusses the current knowledge in substance use and antiretroviral therapy adherence, highlighting recent findings and potential interventions.

RECENT FINDINGS

Studies continue to demonstrate the negative impacts of substance use and related disorders on antiretroviral therapy adherence, with the exception of cannabis. Evidence-based addiction treatment, in particular, opioid agonist therapy, appears to improve adherence levels. Most individual-level adherence specific interventions did not provide sustained effects, and no studies evaluating structural-level interventions were found. Findings suggest the urgent need to scale-up opioid agonist therapy, as well as to simultaneously address multiple structural barriers to care to optimize HIV treatment outcomes among people who use drugs.

Jail, an unappreciated medical home: Assessing the feasibility of a strengths-based case management intervention to improve the care retention of HIV-infected persons once released from jail

Background

Linkage to and retention in care for US persons living with HIV (PLWH) after release from jail usually declines. We know of no rigorously evaluated behavioral interventions that can improve this. We hypothesized that a strengths-based case management intervention that we developed for PLWH leaving jail would increase linkage/retention in care (indicated by receipt of laboratory draws) and a suppressed HIV viral load (VL) in the year following release.

Methods and findings

We conducted a quasi-experimental feasibility study of our intervention for PLWH jailed in Atlanta. We recruited 113 PLWH in jail starting in 2014. “SUCCESS” (Sustained, Unbroken Connection to Care, Entry Services, and Suppression) began in jail and continued post-release. Subjects who started the intervention but subsequently began long-term incarcerations were excluded from further analysis. Persons who were retained in the intervention group were compared to contemporaneously incarcerated PLWH who did not receive the intervention. Identities were submitted to an enhanced HIV/AIDS reporting system (eHARS) at the state health department to capture all laboratories drawn. Both community engagement and care upon jail return were assessed equally. For 44 intervention participants released to Atlanta, 50% of care occurred on subsequent jail stays, as documented with EventFlow software. Forty-five receiving usual services only were recruited for comparison. By examining records of jail reentries, half of participants and 60% of controls recidivated (range: 1–8 returns). All but 6 participants in the intervention and 9 subjects in the comparison arm had ≥1 laboratory recorded in eHARS post-release. Among the intervention group, 52% were retained in care (i.e., had two laboratory studies, > = 3 months apart), versus 40% among the comparison group (OR = 1.60, 95% CI (0.71, 3.81)). Both arms showed improved viral load suppression.

Conclusions

There was a trend towards increased retention for PLWH released from jail after SUCCESS, compared to usual services. Measuring linkage at all venues, including jail-based clinics, fully captured engagement for this frequently recidivating population.

Trial registration

ClinicalTrials.gov NCT02185742

Predictors of linkage to HIV care and viral suppression after release from jails and prisons: a retrospective cohort study

BACKGROUND

Incarceration provides an opportunity for engagement in HIV care but is associated with poor HIV treatment outcomes after release. We aimed to assess post-release linkage to HIV care (LTC) and the effect of transitional case management services.

METHODS

To create a retrospective cohort of all adults with HIV released from jails and prisons in Connecticut, USA (2007-14), we linked administrative custody and pharmacy databases with mandatory HIV/AIDS surveillance monitoring and case management data. We examined time to LTC (defined as first viral load measurement after release) and viral suppression at LTC. We used generalised estimating equations to show predictors of LTC within 14 days and 30 days of release.

FINDINGS

Among 3302 incarceration periods for 1350 individuals between 2007 and 2014, 672 (21%) of 3181 periods had LTC within 14 days of release, 1042 (34%) of 3064 had LTC within 30 days of release, and 301 (29%) of 1042 had detectable viral loads at LTC. Factors positively associated with LTC within 14 days of release are intermediate (31-364 days) incarceration duration (adjusted odds ratio 1·52; 95% CI 1·19-1·95), and transitional case management (1·65; 1·36-1·99), receipt of antiretroviral therapy during incarceration (1·39; 1·11-1·74), and two or more medical comorbidities (1·86; 1·48-2·36). Reincarceration (0·70; 0·56-0·88) and conditional release (0·62; 0·50-0·78) were negatively associated with LTC within 14 days. Hispanic ethnicity, bonded release, and psychiatric comorbidity were also associated with LTC within 30 days but reincarceration was not.

INTERPRETATION

LTC after release is suboptimal but improves when inmates' medical, psychiatric, and case management needs are identified and addressed before release. People who are rapidly cycling through jail facilities are particularly vulnerable to missed linkage opportunities. The use of integrated programmes to align justice and health-care goals has great potential to improve long-term HIV treatment outcomes.

FUNDING

US National Institutes of Health.

Awareness and understanding of HIV non-disclosure case law among people living with HIV who use illicit drugs in a Canadian setting

BACKGROUND

In 2012, the Supreme Court of Canada (SCC) ruled that people living with HIV (PLWH) could face criminal charges if they did not disclose their serostatus before sex posing a "realistic possibility" of HIV transmission. Condom-protected vaginal sex with a low (i.e., <1500copies/mL) HIV viral load (VL) incurs no duty to disclose. Awareness and understanding of this ruling remain uncharacterized, particularly among marginalized PLWH.

METHODS

We used data from ACCESS, a community-recruited cohort of PLWH who use illicit drugs in Vancouver. The primary outcome was self-reported awareness of the 2012 SCC ruling, drawn from cross-sectional survey data. Participants aware of the ruling were asked how similar their understanding was to a provided definition. Sources of information from which participants learned about the ruling were determined. Multivariable logistic regression identified factors independently associated with ruling awareness.

RESULTS

Among 249 participants (39% female), median age was 50 (IQR: 44-55) and 80% had a suppressed HIV VL (<50copies/mL). A minority (112, 45%) of participants reported ruling awareness, and 44 (18%) had a complete understanding of the legal obligation to disclose. Among those aware (n=112), newspapers/media (46%) was the most frequent source from which participants learned about the ruling, with 51% of participants reporting that no healthcare providers had talked to them about the ruling. Ruling awareness was negatively associated with VL suppression (AOR:0.51, 95% CI:0.27,0.97) and positively associated with recent condomless sex vs. no sex (AOR:2.00, 95% CI:1.03,3.92).

CONCLUSION

Most participants were not aware of the 2012 SCC ruling, which may place them at risk of prosecution. Discussions about disclosure and the law were lacking in healthcare settings. Advancing education about HIV disclosure and the law is a key priority. The role of healthcare providers in delivering information and support to PLWH in this legal climate should be further explored.

Antiretroviral Therapy Interruption Among HIV Postive People Who Use Drugs in a Setting with a Community-Wide HIV Treatment-as-Prevention Initiative

HIV Treatment as Prevention (TasP) initiatives promote antiretroviral therapy (ART) access and optimal adherence (≥95 %) to produce viral suppression among people living with HIV (PLHIV) and prevent the onward transmission of HIV. ART treatment interruptions are common among PLHIV who use drugs and undermine the effectiveness of TasP. Semi-structured interviews were conducted with 39 PLHIV who use drugs who had experienced treatment ART interruptions in a setting with a community-wide TasP initiative (Vancouver, Canada) to examine influences on these outcomes. While study participants attributed ART interruptions to "treatment fatigue," our analysis revealed individual, social, and structural influences on these events, including: (1) prior adverse ART-related experiences among those with long-term treatment histories; (2) experiences of social isolation; and, (3) breakdowns in the continuity of HIV care following disruptive events (e.g., eviction, incarceration). Findings reconceptualise 'treatment fatigue' by focusing attention on its underlying mechanisms, while demonstrating the need for comprehensive structural reforms and targeted interventions to optimize TasP among drug-using PLHIV.

Inability to access health and social services associated with mental health among people who inject drugs in a Canadian setting

BACKGROUND

People who inject drugs (PWID) face barriers to healthcare due to reasons including comorbidity. We evaluated access to health and social services by three of the most prevalent comorbid conditions among PWID: HIV, hepatitis C (HCV), and mental health, in an urban setting in Canada.

METHODS

Data were derived from prospective cohorts of community-recruited PWID between 2005 and 2015. HIV and HCV serostatuses were based on antibody tests, while mental health conditions and inability to access health and social services (barriers to access) were determined by participants' self-report. We employed generalized linear mixed models controlling for confounders to examine associations between health conditions and barriers to access.

RESULTS

Among 2494 participants, 1632 (65.4%) reported barriers to access at least once over a median of seven (IQR: 3, 12) semi-annual assessments. Mental health conditions were independently associated with increased odds of reporting barriers (adjusted Odds Ratio (aOR): 1.45, 95% Confidence Interval (CI): 1.32, 1.58), while HIV was not (aOR: 0.96, 95% CI: 0.85, 1.08), and HCV was associated with decreased odds (aOR: 0.80, 95% CI: 0.69, 0.93). The associations between mental health conditions and barriers to access were consistent among PWID without HIV/HCV (aOR: 1.35, 95% CI: 1.10, 1.65), with HCV mono-infection (aOR: 1.55, 95% CI: 1.37, 1.75), and HCV/HIV co-infection (aOR: 1.36, 95% CI: 1.15, 1.60).

CONCLUSIONS

Targeted strategies to seek and treat mental health conditions in settings that serve PWID, and assist PWID with mental health conditions in navigating healthcare system may improve the publicly-funded health and social services.

HIV, prisoners, and human rights

Worldwide, a disproportionate burden of HIV, tuberculosis, and hepatitis is present among current and former prisoners. This problem results from laws, policies, and policing practices that unjustly and discriminatorily detain individuals and fail to ensure continuity of prevention, care, and treatment upon detention, throughout imprisonment, and upon release. These government actions, and the failure to ensure humane prison conditions, constitute violations of human rights to be free of discrimination and cruel and inhuman treatment, to due process of law, and to health. Although interventions to prevent and treat HIV, tuberculosis, hepatitis, and drug dependence have proven successful in prisons and are required by international law, they commonly are not available. Prison health services are often not governed by ministries responsible for national public health programmes, and prison officials are often unwilling to implement effective prevention measures such as needle exchange, condom distribution, and opioid substitution therapy in custodial settings, often based on mistaken ideas about their incompatibility with prison security. In nearly all countries, prisoners face stigma and social marginalisation upon release and frequently are unable to access health and social support services. Reforms in criminal law, policing practices, and justice systems to reduce imprisonment, reforms in the organisation and management of prisons and their health services, and greater investment of resources are needed.

The perfect storm: incarceration and the high-risk environment perpetuating transmission of HIV, hepatitis C virus, and tuberculosis in Eastern Europe and Central Asia

Despite global reductions in HIV incidence and mortality, the 15 UNAIDS-designated countries of Eastern Europe and Central Asia (EECA) that gained independence from the Soviet Union in 1991 constitute the only region where both continue to rise. HIV transmission in EECA is fuelled primarily by injection of opioids, with harsh criminalisation of drug use that has resulted in extraordinarily high levels of incarceration. Consequently, people who inject drugs, including those with HIV, hepatitis C virus, and tuberculosis, are concentrated within prisons. Evidence-based primary and secondary prevention of HIV using opioid agonist therapies such as methadone and buprenorphine is available in prisons in only a handful of EECA countries (methadone or buprenorphine in five countries and needle and syringe programmes in three countries), with none of them meeting recommended coverage levels. Similarly, antiretroviral therapy coverage, especially among people who inject drugs, is markedly under-scaled. Russia completely bans opioid agonist therapies and does not support needle and syringe programmes-with neither available in prisons-despite the country's high incarceration rate and having the largest burden of people with HIV who inject drugs in the region. Mathematical modelling for Ukraine suggests that high levels of incarceration in EECA countries facilitate HIV transmission among people who inject drugs, with 28-55% of all new HIV infections over the next 15 years predicted to be attributable to heightened HIV transmission risk among currently or previously incarcerated people who inject drugs. Scaling up of opioid agonist therapies within prisons and maintaining treatment after release would yield the greatest HIV transmission reduction in people who inject drugs. Additional analyses also suggest that at least 6% of all incident tuberculosis cases, and 75% of incident tuberculosis cases in people who inject drugs are due to incarceration. Interventions that reduce incarceration itself and effectively intervene with prisoners to screen, diagnose, and treat addiction and HIV, hepatitis C virus, and tuberculosis are urgently needed to stem the multiple overlapping epidemics concentrated in prisons.

Prevention of transmission of HIV, hepatitis B virus, hepatitis C virus, and tuberculosis in prisoners

The prevalence of HIV, hepatitis B virus, hepatitis C virus, and tuberculosis are higher in prisons than in the general population in most countries worldwide. Prisons have emerged as a risk environment for these infections to be further concentrated, amplified, and then transmitted to the community after prisoners are released. In the absence of alternatives to incarceration, prisons and detention facilities could be leveraged to promote primary and secondary prevention strategies for these infections to improve prisoners health and reduce risk throughout incarceration and on release. Effective treatment of opioid use disorders with opioid agonist therapies (eg, methadone and buprenorphine) prevents blood-borne infections via reductions in injection in prison and after release. However, large gaps exist in the implementation of these strategies across all regions. Collaboration between the criminal justice and public health systems will be required for successful implementation of these strategies.

HIV Testing, HIV Positivity, and Linkage and Referral Services in Correctional Facilities in the United States, 2009-2013

BACKGROUND

Because of health disparities, incarcerated persons are at higher risk for multiple health issues, including HIV. Correctional facilities have an opportunity to provide HIV services to an underserved population. This article describes Centers for Disease Control and Prevention (CDC)-funded HIV testing and service delivery in correctional facilities.

METHODS

Data on HIV testing and service delivery were submitted to CDC by 61 health department jurisdictions in 2013. HIV testing, HIV positivity, receipt of test results, linkage, and referral services were described, and differences across demographic characteristics for linkage and referral services were assessed. Finally, trends were examined for HIV testing, HIV positivity, and linkage from 2009 to 2013.

RESULTS

Of CDC-funded tests in 2013 among persons 18 years and older, 254,719 (7.9%) were conducted in correctional facilities. HIV positivity was 0.9%, and HIV positivity for newly diagnosed persons was 0.3%. Blacks accounted for the highest percentage of HIV-infected persons (1.3%) and newly diagnosed persons (0.5%). Only 37.9% of newly diagnosed persons were linked within 90 days; 67.5% were linked within any time frame; 49.7% were referred to partner services; and 45.2% were referred to HIV prevention services. There was a significant percent increase in HIV testing, overall HIV positivity, and linkage from 2009 to 2013. However, trends were stable for newly diagnosed persons.

CONCLUSIONS

Identification of newly diagnosed persons in correctional facilities has remained stable from 2009 to 2013. Correctional facilities seem to be reaching blacks, likely due to higher incarceration rates. The current findings indicate that improvements are needed in HIV testing strategies, service delivery during incarceration, and linkage to care postrelease.

Factors associated with initiation of antiretroviral therapy among HIV-positive people who use injection drugs in a Canadian setting

OBJECTIVE

To identify behavioral, social, and structural factors associated with time from HIV seroconversion to antiretroviral therapy (ART) initiation among people who use injection drugs (PWID).

DESIGN

Two complementary prospective cohorts of PWID linked to comprehensive ART dispensation records in a setting of universal no-cost HIV/AIDS treatment and care.

METHODS

Multivariable extended Cox models of time to ART initiation among baseline HIV-seronegative PWID who seroconverted after recruitment adjusted with a time-updated measure of clinical eligibility for ART.

RESULTS

We included 133 individuals of whom 98 (74%) initiated ART during follow-up at a rate of 12.4 per 100 person-years. In a multivariable model adjusted for ART eligibility, methadone maintenance therapy [adjusted hazard ratio (AHR) = 2.37, 95% confidence interval (95% CI): 1.56-3.60] and a more recent calendar year of observation (AHR = 1.06, 95% CI: 1.00-1.12) were associated with more rapid ART initiation, whereas informal income generation (AHR = 0.51, 95% CI: 0.32-0.79) and incarceration (AHR = 0.52, 95% CI: 0.28-0.97) were negatively associated with ART initiation.

CONCLUSION

In this sample of community-recruited HIV-positive PWID with well defined dates of HIV seroconversion, we found that two measures related to the criminalization of illicit drug use each independently delayed ART initiation regardless of clinical eligibility. Engagement in methadone promoted ART initiation. Programs to scale-up HIV treatment among PWID should consider decreased criminalization of PWID and increased access to opioid substitution therapy to optimize the impact of ART on HIV/AIDS-associated morbidity, mortality, and HIV transmission.

The impact of criminalization of HIV non-disclosure on the healthcare engagement of women living with HIV in Canada: a comprehensive review of the evidence

Introduction

In 2012, the Supreme Court of Canada ruled that people living with HIV (PLWH) must disclose their HIV status to sexual partners prior to sexual activity that poses a “realistic possibility” of HIV transmission for consent to sex to be valid. The Supreme Court deemed that the duty to disclose could be averted if a person living with HIV both uses a condom and has a low plasma HIV-1 RNA viral load during vaginal sex. This is one of the strictest legal standards criminalizing HIV non-disclosure worldwide and has resulted in a high rate of prosecutions of PLWH in Canada. Public health advocates argue that the overly broad use of the criminal law against PLWH undermines efforts to engage individuals in healthcare and complicates gendered barriers to linkage and retention in care experienced by women living with HIV (WLWH).

Methods

We conducted a comprehensive review of peer-reviewed and non-peer-reviewed evidence published between 1998 and 2015 evaluating the impact of the criminalization of HIV non-disclosure on healthcare engagement of WLWH in Canada across key stages of the cascade of HIV care, specifically: HIV testing and diagnosis, linkage and retention in care, and adherence to antiretroviral therapy. Where available, evidence pertaining specifically to women was examined. Where these data were lacking, evidence relating to all PLWH in Canada or other international jurisdictions were included.

Results and discussion

Evidence suggests that criminalization of HIV non-disclosure may create barriers to engagement and retention within the cascade of HIV care for PLWH in Canada, discouraging access to HIV testing for some people due to fears of legal implications following a positive diagnosis, and compromising linkage and retention in healthcare through concerns of exposure of confidential medical information. There is a lack of published empirical evidence focused specifically on women, which is a concern given the growing population of WLWH in Canada, among whom marginalized and vulnerable women are overrepresented.

Conclusions

The threat of HIV non-disclosure prosecution combined with a heightened perception of surveillance may alter the environment within which women engage with healthcare services. Fully exploring the extent to which HIV criminalization represents a barrier to the healthcare engagement of WLWH is a public health priority.

Socioeconomic marginalization and plasma HIV-1 RNA nondetectability among individuals who use illicit drugs in a Canadian setting

OBJECTIVE

Given that people who use illicit drugs (PWUD) often engage in prohibited income generation to support their basic needs, we sought to examine the role of these activities in shaping antiretroviral therapy (ART) adherence and plasma HIV RNA-1 viral load suppression among HIV-infected PWUD.

DESIGN

Longitudinal analyses among HIV-positive, ART-exposed PWUD in the AIDS Care Cohort to evaluate Exposure to Survival Services prospective cohort study (2005-2013).

METHODS

Generalized linear mixed-effects and mediation analyses examined the relationship between prohibited income generation (e.g., sex work, drug dealing, theft, street-based income) and virologic suppression (plasma viral load ≤50 copies/ml plasma) adjusting for adherence and potential confounders.

RESULTS

Among 687 HIV-infected PWUD, 391 (56.9%) individuals reported prohibited income generation activity during the study period. In multivariate analyses, prohibited income generation remained independently and negatively associated with virologic suppression (adjusted odds ratio: 0.68, 95% confidence interval: 0.52-0.88) following adjustment for hypothesized confounders, including high-intensity drug use, ART adherence and homelessness. Although partially mediated by ART adherence, the relationship between prohibited income generation and virologic suppression was maintained in mediation analyses (Sobel statistic = -1.95, P = 0.05).

CONCLUSION

Involvement in prohibited income generation decreases the likelihood of virologic suppression directly and indirectly through its negative association with ART adherence. These findings suggest that linkages between socioeconomic marginalization, the criminalization of illicit drug use, and insufficient employment opportunities may produce barriers to access and retention in care. Programmatic and policy interventions that decrease socioeconomic vulnerability may therefore reduce HIV-related morbidity, mortality, and onward transmission.

IAPAC Guidelines for Optimizing the HIV Care Continuum for Adults and Adolescents

BACKGROUND

An estimated 50% of people living with HIV (PLHIV) globally are unaware of their status. Among those who know their HIV status, many do not receive antiretroviral therapy (ART) in a timely manner, fail to remain engaged in care, or do not achieve sustained viral suppression. Barriers across the HIV care continuum prevent PLHIV from achieving the therapeutic and preventive effects of ART.

METHODS

A systematic literature search was conducted, and 6132 articles, including randomized controlled trials, observational studies with or without comparators, cross-sectional studies, and descriptive documents, met the inclusion criteria. Of these, 1047 articles were used to generate 36 recommendations to optimize the HIV care continuum for adults and adolescents.

RECOMMENDATIONS

Recommendations are provided for interventions to optimize the HIV care environment; increase HIV testing and linkage to care, treatment coverage, retention in care, and viral suppression; and monitor the HIV care continuum.