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Background Multi-month dispensing (MMD) of antiretroviral therapy (ART) decreases logistical burdens on HIV clinics and patients, which is especially important during the COVID-19 pandemic. HIV programs are scaling-up 6-month dispensing (6MD), but the impact on viral suppression (VS) has not been well-documented in programmatic settings. Methods The African Cohort Study (AFRICOS) is an international observational study of people living with HIV (PLWH) receiving HIV care. In Nigeria and Kenya, this includes 6MD. Participants undergo semiannual viral load quantification and were included in analysis if they had complete data, documentation of MMD (self-reported) and at least two follow-up visits after initiating MMD. In stratified analyses for each country, we used multivariable logistic regression with generalized estimating equations to estimate adjusted odds ratios (aOR) and 95% confidence intervals (95%CI) comparing VS < 50 copies/mL among those who received 6MD to those given 3-5 months dispensing (3-5MD) of ART. Analyses were adjusted for age, education, employment, distance to clinic, duration on ART, ART regimen (TLD vs other) and self-reported ART adherence (≥ 1 missed dose in past 30 days). Results Between January 30, 2020, when MMD data was first collected, and September 1, 2021, 1176 PLWH in Kenya and 272 in Nigeria had at least one visit; 285 participants from Kenya, totaling 442 visits, and 177 participants from Nigeria, totaling 382 visits, met criteria and were included in analysis. At most recent visit, VS < 50 copies/mL was documented in 266 (93.3%) participants from Kenya and 125 (70.6%) participants from Nigeria. Among the 35 participants given 6MD in Kenya, compared to 250 participants given 3-5MD, the aOR for VS was 0.42 (95%CI: 0.13-1.37); among the 91 participants given 6MD in Nigeria, compared to the 86 participants given 3-5MD, the aOR was 3.01 (95%CI: 1.70-5.31). Conclusion The positive association between 6MD and VLS in Nigeria, as compared to 3-5MD, should prompt more aggressive scale-up of 6MD. The lack of an association in Kenya merits further investigation, but likely relates to high overall VS and few participants on 6MD. Updated data from specific geographic and demographic sub-populations is needed to inform programming as 6MD is scaled. Disclosures All Authors: No reported disclosures.

Background Pre-exposure prophylaxis (PrEP) is an essential component to stopping the HIV epidemic. Recent breakthroughs in PrEP including the vaginal ring and long-acting preparations provide more options for individuals. However, PrEP uptake continues to be a challenge. We evaluated PrEP awareness and barriers to PrEP uptake among individuals in four sub-Saharan African countries. Methods Individuals aged 16 years or older without HIV were referred to the African Cohort Study (AFRICOS) at 12 PEPFAR-supported clinics in Uganda, Kenya, Tanzania and Nigeria through their sexual partners, social media outlets or outreach to communities and schools. Starting in 2020, participants were administered a survey regarding PrEP knowledge, practices, and beliefs every six months. We conducted descriptive analyses from a participant’s first study visit after PrEP-related questions had been introduced. Results From February 2020 to November 2021, the PrEP survey was completed by 372 participants, of whom 204 (55%) were female; their median age was 37.5 (interquartile range (IQR): 26.6-46.5) years old; 228 (61%) were married; 64 (17%) consumed alcohol and 6 (2%) used recreational drugs. Of the 314 (92%) who reported ever having sex, the median age at sexual debut was 18 (IQR: 16-19); 241 (77%) reported 1 regular partner; 295 (94%) had no casual partners in the past six months, 97 (31%) had an HIV+ partner and 26 (10%) had a partner with an unknown HIV status. Results from the PrEP survey are in the Figure. When asked about PrEP, 44 (29%) had discussed PrEP with their provider and 73 (20%) stated they would feel ashamed or embarrassed taking PrEP. Those who had heard of PrEP were more likely to be unmarried (p=0.046) and more likely not to have used a condom during the last sexual encounter with their regular partner (p< 0.05). PrEP knowledge and practices Conclusion In our cohort, few participants had heard of or were taking PrEP. While our cohort may not represent a high-risk population, PrEP awareness was limited among those who were either unaware of their partner’s status or who had a partner infected with HIV. The lack of PrEP awareness highlights the need for increased provider education and outreach especially as new, and potentially less stigmatizing, PrEP options come to market. Disclosures All Authors: No reported disclosures.