Impact of COVID-19 pandemic on vaccine hesitancy and sentiment changes: A survey of healthcare workers in 12 countries

Objectives: Healthcare workers (HCWs) are a trusted source of vaccine-related information for patients and communities, but they can show hesitancy or reluctance towards vaccinations. The objective of our study was to investigate HCWs’ sentiment and hesitancy towards vaccination, focusing on COVID-19 and influenza vaccination. Study design: A global cross-sectional study spanning four continents. Methods: Utilizing a web-based survey, we gathered responses from 7793 HCWs across twelve countries. We used Latent Class Analysis models to build response profiles for respondents. We employed multilevel multivariable logistic regression models to assess the impact of individual determinants and country contextual effects on change in vaccine sentiment (ChVS) and COVID-19 vaccine hesitancy (CoVH). Results: HCWs exhibited high agreement on the safety, effectiveness, and usefulness of vaccines. However, 21% reported strong or moderate CoVH. Country contextual effects significantly influenced ChVS and CoVH, with variations observed across nations, accounting for 6% of global variance in both ChVS and CoVH. Individual factors such as educational level, fear of contracting COVID-19, knowledge of COVID 19 vaccines, CoVH, influenza vaccination behaviour and general confidence in vaccines significantly influenced ChVS. CoVH was related to profession, influenza vaccination behaviour, fear of COVID-19 and main information sources. Conclusions: Individual factors played a major role in determining change in vaccine sentiment and COVID-19 vaccine hesitancy, but they can be modulated by other contextual elements at the country level. There is a need for tailored, nation-specific strategies to address vaccine hesitancy and enhance vaccine confidence among HCWs.