Gilead's PURPOSE 1 trial exclusively focused on young African women and adolescent girls for an investigational HIV PrEP medication, aiming to address historical exclusion in HIV clinical trials. Enrolling thousands of cisgender women and girls aged 16-25 in South Africa and Uganda, the trial studied a six-monthly injection, with encouraging preliminary results. The trial, influenced by Global Community Accountability Groups, included pregnant and lactating women, setting a new standard for HIV prevention trials.