Table A2.

MeSH terms.

Host Database	Database/Collection	MeSH Terms	Additional Search Options
Proquest	Public Health Database	(COVID-19 OR COVID-19 OR covid OR coronavirus OR 2019-ncov OR SARS-CoV-2 OR COVID-19) AND (vaccin* hesitancy OR vaccin* refusal OR the anti-vaccine movement OR immunization refusal OR unvaccinated) AND (us OR united states OR united states of america OR usa OR u.s. OR america OR american OR u.s.a. OR u.s.)	Publication Date: January 2022–August 2023 PEER (yes)
	Biological Science Collection
	Health and Medical Collection
	Psychology Database
Ebscohost	Medline		Publication Date: January 2022–August 2023
	CINAHL
	Health Source: Nursing/Academic Edition
	APA PsycInfo
	Psychology and Behavioral Sciences Collection
	APA Psycarticles
Pubmed	Pubmed
Clarivate	Web of Science	((TS = (COVID-19 or COVID-19 or covid or coronavirus or 2019-ncov or SARS-CoV-2 or COVID-19)) AND TS = (vaccine hesitancy or vaccine refusal or the anti-vaccine movement or immunization refusal or unvaccinated)) AND TS = (us or united states or united states of america or usa or u.s. or america or american or u.s.a. Or u.s.)	Publication Years: 2022–2023
Elsevier	Science Direct	COVID-19, vaccination hesitancy, united states	Years: 2022–2023 Document Type: Article
	Scopus
Google Scholar	Google Scholar	COVID-19, vaccination hesitancy, united states	Sorted by date, Removed articles published before 2022
Wiley	Wiley Online Library	COVID-19, vaccination hesitancy, vaccine acceptance, united states	Years: 2022–2023
Springerlink	Springerlink	COVID-19, vaccination hesitancy, united states	Filters Applied: Article, 2022–2023
Wiley	Cochrane COVID-19 Study Register	Vaccine and hesitancy and united and states and covid and 19	Created: 1 January 2022–31 August 2023
ITHAKA	JSTOR	COVID-19, vaccination hesitancy, united states	Date: 2022–2023
Wiley	Cochrane Library

vaccin* incorporates vaccine, vaccines, vaccinate and vaccination.