Monkeypox Vaccination Strategy and Missed Opportunities in STI and HIV Prevention: An Urban Sexual Health Clinic's Experience During a Public Health Emergency.

Among individuals presenting for monkeypox vaccination, transition from an opt-out protocol for sexually transmitted infection (STI) and HIV risk assessment and testing to an opt-in protocol was associated with a substantial increase in missed opportunities for HIV pre-exposure prophylaxis and STI testing at an ambulatory sexual health clinic.