| B31 | OPTIPRIM 2-ANRS trial comparing dolutegravir vs darunavir in acute HIV-1 infection | E-poster | ART in acute infection |
| D2 | Optimizing transitioning to differentiated service delivery key approach to achieving (UNAIDS) 90-90-90 treatment targets in Kogi State, Nigeria | E-poster | Impact evaluation of differentiated service delivery |
| D63 | Optimizing antiretroviral treatment and viral suppression for adolescents and young people living with HIV by implementing Operation Triple Zero (OTZ) in four states in Nigeria | On-demand oral abstract session | Growing up with HIV: specific needs and interventions for children and adolescents |
| D4 | Optimal characteristics of Peer Navigators: adapting a peer-based intervention with street-involved youth in Canada and Kenya to increase uptake of HIV prevention, testing and treatment | E-poster | Methods to improve provider quality, supply and adaptation of services |
| C43 | Opportunities to integrate PrEP into primary care: results of an online focus group study among family physicians in Flanders, Belgium | E-poster | Integration of HIV prevention services into health and other platforms |
| B30 | Opioid agonist treatment improves progression through each stage of the HIV cascade of care among people living with HIV who use opioids | E-poster | Substance abuse (including opioid use disorder) |
| D110 | Online interventions effectively reduce HIV-related stigma among the general population | E-poster | Interventions to reduce stigma and discrimination |
| C5 | Ongoing HIV transmission following a large HIV outbreak among people who inject drugs in Athens, Greece | E-poster | Epidemiology of HIV in people who use drugs |
| D15 | One size does not fit all: preferences for HIV care delivery among out-of-care people living with HIV in the United States | E-poster | Retention in HIV services |
| B61 | Once-daily integrase inhibitor (INSTI) with boosted darunavir is non-inferior to standard of care in virologically suppressed children, Week 48 results of the SMILE PENTA-17 TRIAL | E-poster | Clinical trials in paediatric and adolescent populations |