Hesitancy to receive the novel coronavirus vaccine and potential influences on vaccination among a cohort of healthcare workers in the Democratic Republic of the Congo

•COVID-19 vaccine hesitancy was not static among a HCW cohort in the DRC over time.•Vaccine hesitancy among the HCWs dramatically increased in mid-March 2021.•Nearly a quarter of respondents reported vaccine hesitancy in late-August 2021.•Patterns between reported influences on willingness to get vaccinated varied over time.•Support for vaccine schedule adherence, apart from COVID-19, was consistently high.