In collaboration with the Gates Foundation, Merck advances MK-8527 pre-exposure prophylaxis (PrEP) clinical trials globally RAHWAY, N.J. / Jul 14, 2025 / Business Wire / Merck (NYSE: MRK), known as MSD outside of the United States and Canada, today announced the initiation of the EXPrESSIVE Phase 3 clinical trials, evaluating the safety and efficacy of MK-8527, an investigational once-monthly, oral nucleoside reverse... Read More