Recommended section	Item	PRISMA‐ScR checklist item	Reported	Section
TITLE
Title	1	Identify the report as a scoping review.	yes	Title
ABSTRACT
Structured summary	2	Provide a structured summary that includes (as applicable): background, objectives, eligibility criteria, sources of evidence, charting methods, results, and conclusions that relate to the review questions and objectives.	yes	Abstract
INTRODUCTION
Rationale	3	Describe the rationale for the review in the context of what is already known. Explain why the review questions/objectives lend themselves to a scoping review approach.	yes	Background ‐ Rationale for conducting a scoping review
Objectives	4	Provide an explicit statement of the questions and objectives being addressed with reference to their key elements (e.g. population or participants, concepts, and context) or other relevant key elements used to conceptualise the review questions and/or objectives.	yes	Objectives
METHODS
Protocol and registration	5	Indicate whether a review protocol exists; state if and where it can be accessed (e.g., a Web address); and if available, provide registration information, including the registration number.	yes	Methods
Eligibility criteria	6	Specify characteristics of the sources of evidence used as eligibility criteria (e.g. years considered, language, and publication status), and provide a rationale.	yes	Methods
Information sources	7	Describe all information sources in the search (e.g. databases with dates of coverage and contact with authors to identify additional sources), as well as the date the most recent search was executed.	yes	Methods and appendices
Search	8	Present the full electronic search strategy for at least 1 database, including any limits used, such that it could be repeated.	yes	Appendices
Selection of sources of evidence	9	State the process for selecting sources of evidence (i.e. screening and eligibility) included in the scoping review.	yes	Methods
Data charting process	10	Describe the methods of charting data from the included sources of evidence (e.g. calibrated forms or forms that have been tested by the team before their use, and whether data charting was done independently or in duplicate) and any processes for obtaining and confirming data from investigators.	yes	Methods
Data items	11	List and define all variables for which data were sought and any assumptions and simplifications made.	Yes	Methods
Critical appraisal of individual sources of evidence	12	If done, provide a rationale for conducting a critical appraisal of included sources of evidence; describe the methods used and how this information was used in any data synthesis (if appropriate).	NA	‐
Synthesis of results	13	Describe the methods of handling and summarising the data that were charted.	yes	Methods
RESULTS
Selection of sources of evidence	14	Give numbers of sources of evidence screened, assessed for eligibility, and included in the review, with reasons for exclusions at each stage, ideally using a flow diagram.	yes	Methods, Figure 1
Characteristics of sources of evidence	15	For each source of evidence, present characteristics for which data were charted and provide the citations.	yes	Online data maps (egmopenaccess.3ieimpact.org/evidence-maps/scoping-review-covid-19-vaccines; egmopenaccess.3ieimpact.org/evidence-maps/scoping-review-covid-19-vaccines-duplicated-subgroups) and at OSF (osf.io/qmcgv/)
Critical appraisal within sources of evidence	16	If done, present data on critical appraisal of included sources of evidence (see item 12).	Not done	‐
Results of individual sources of evidence	17	For each included source of evidence, present the relevant data that were charted that relate to the review questions and objectives.	partly	Online at OSF (osf.io/qmcgv/)
Synthesis of results	18	Summarise and/or present the charting results as they relate to the review questions and objectives.	yes	Results, table 1, table 2, table 3, table 4
DISCUSSION
Summary of evidence	19	Summarise the main results (including an overview of concepts, themes, and types of evidence available), link to the review questions and objectives, and consider the relevance to key groups.	yes	Discussion ‐ Summary of the main results
Limitations	20	Discuss the limitations of the scoping review process.	yes	Discussion
Conclusions	21	Provide a general interpretation of the results with respect to the review questions and objectives, as well as potential implications and/or next steps.	yes	Discussion, Authors' conclusions
FUNDING
Funding	22	Describe sources of funding for the included sources of evidence, as well as sources of funding for the scoping review. Describe the role of the funders of the scoping review.	no/yes	Sources of funding of included studies not described; source of funding for scoping review reported
See Tricco 2018