BACKGROUND Studies of short-term mental health (MH) outcomes among frontline (FL) healthcare workers (HCWs) during the pandemic have been extensively published and have reached dramatically variable conclusions. Long-term MH outcomes in this population have received less study. A synthesis of available data on long-term MH outcomes among FL HCWs associated with the coronavirus disease 2019 (COVID-19) pandemic is needed to inform efforts for screening, mobilizing psychiatry resources, and prepari