Table A1.

Keywords and syntax used for search strategy.

Key Concepts	PubMed MeSH Terms	PubMed Keywords
COVID-19	COVID-19 OR SARS-CoV-2 OR COVID-19 Vaccines	COVID-19 OR “COVID-19 pandemic” OR “coronavirus pandemic” OR “COVID-19 virus” OR “COVID-19 vaccine*”
Influenza	Influenza OR Vaccines	influenza OR flu OR “influenza vaccine*” OR “flu vaccine*”
Sentiment/Acceptance	Health Knowledge, Attitudes, Practice OR Acceptability of Healthcare OR Health Personnel Attitude	accept* OR sentiment OR belief*
Health Workers	Health Personnel OR Professional Role	“Healthcare worker*” OR “Health care worker*” OR “health professional*” OR “public health care worker*” OR “public healthcare worker*”
Vaccine Hesitancy	Vaccine OR Vaccination OR Immunization OR Vaccination Refusal	Immunis* OR Immuniz* OR Vaccin* OR “vaccine hesitan*”