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Refusals and delay in receiving COVID-19 vaccines due to vaccine hesitancy present major barriers to optimal vaccine uptake and thus epidemic control, with crisis-affected populations facing additional challenges. International Medical Corps conducted a cross-sectional survey to evaluate knowledge, attitudes, and perceptions regarding COVID-19 and identify determinants of COVID-19 vaccine hesitancy among 413 healthcare workers (HCW) working at 90 national primary healthcare centers in Lebanon, just prior to widespread vaccine rollout. Logistic regression was used to assess predictors of vaccine acceptance using the health belief Model. More than half (56.9%) of HCWs were categorized as being vaccine-hesitant, while 43.1% reported they would receive a vaccine when available. Perceived benefits, cues to action, and social norms were positively associated with vaccine acceptance. More than half (56.4%) believed the national health system was not capable of ensuring safe administration of the COVID-19 vaccine. Targeted interventions that emphasize the benefits of COVID-19 vaccination, highlight cues to vaccinate, and promote vaccination as a social norm are critical in motivating HCWs to get vaccinated. Increasing HCW trust in Lebanon’s national health system is critical to building confidence toward COVID-19 vaccines and has implications for the success of future responses to infectious disease outbreaks.

Vaccine hesitancy among displaced populations is associated with inequitable access to services and mistrust of authorities, among other factors. This study evaluated variations in attitudes toward COVID-19 vaccines and factors associated with vaccine acceptance among refugees and Lebanese nationals accessing 60 International Medical Corps-supported health facilities through two cross-sectional surveys pre- (n = 3927; Survey 1) and post- (n = 4174; Survey 2) vaccine rollout. Logistic regression was used to assess predictors of vaccine acceptance using the health beliefs model. Refugees comprised 52.9% (Survey 1) and 54.2% (Survey 2) of respondents. Vaccine acceptance was low among both groups in Survey 1 (25.9% refugees vs. 23.1% Lebanese nationals), but higher in Survey 2 in Lebanese (57.6%) versus refugees (32.9%). Participants reported greater perceived benefits of vaccination, higher perceived COVID-19 susceptibility, and lower perceived vaccination barriers in Survey 2 versus Survey 1. Post-vaccine rollout, refugees had lower odds of vaccine acceptance compared to Lebanese (OR 0.50, 95%CI 0.41–0.60), while older age (OR 1.37, 95%CI 1.06–1.78, ≥51 years vs. 18–30 years) was associated with greater vaccine acceptance. Health beliefs model variables were associated with vaccine acceptance in both surveys. Tailored strategies to respond dynamically to changes in vaccine attitudes among vulnerable groups in Lebanon are essential for equitable vaccine uptake.