Rethinking external assistance for health.

Coronavirus disease (COVID-19) and the subsequent economic crisis have raised questions about the long-term sustainability of external assistance for health and the interventions that it supports. New thinking is needed on how external assistance for health may best contribute to the sustainable coverage of essential health interventions embedded within countries’ efforts to make progress towards Universal Health Coverage (UHC). We propose a research agenda to expand the evidence base and inform this rethink of external assistance to support sustainable coverage.