Table 1.

Study selection and reasons for exclusion.

Study Inclusion/Exclusion Criteria	Number of Studies
Pubmed search performed on 13 April 2022, for articles published within the last 5 years. Search terms: (“vaccine” [MeSH] OR “vaccination” [MeSH] OR vaccine [All Fields] OR vaccination [All Fields] OR vaccine* [All Fields]) AND (“cancer” [MeSH] OR “cancer” OR “malignancy” OR “malign*” OR “immunocompromise” [All Fields] OR “immunocompromised” [All Fields] OR “immunodeficiency” [All Fields] OR “immunodeficient” [All Fields] OR “immunodef*” [All Fields] OR “immunocompr*” [All Fields] OR “chemotherapy” [All Fields] OR “chemo*” [All Fields] OR “immunosuppressed” [All Fields] OR “immunosuppression” [All Fields] OR “immunosupp*” [All Fields] OR “rheumatology” [All Fields] OR “rheumatic” [All Fields] OR “rheum*” [All Fields] OR “autoimmune” [All Fields] OR “autoimmunity” [All Fields] OR “transplant” [All Fields] OR “solid organ” [All Fields] OR steroids [MeSH] OR antineoplastic agents [MeSH] OR chemotherapy [MeSH] OR cytotoxicity [MeSH] OR immunologic [MeSH] OR antirheumatic agents [MeSH] OR immunosuppressive agents [MeSH] or steroid* or corticosteroid* or (antineoplastic* AND agent*) OR chemotherap* or cytotoxic*) AND ((“Meta-Analysis as Topic” [MeSH] OR meta analy* [TIAB] OR metaanaly* [TIAB] OR “Meta-Analysis” [PT] OR “Systematic Review” [PT] OR “Systematic Reviews as Topic” [MeSH] OR systematic review* [TIAB] OR systematic overview* [TIAB] OR “Review Literature as Topic” [MeSH]) OR (cochrane [TIAB] OR embase [TIAB] OR psychlit [TIAB] OR psyclit [TIAB] OR psychinfo [TIAB] OR psycinfo [TIAB] OR cinahl [TIAB] OR cinhal [TIAB] OR “science citation index” [TIAB] OR bids [TIAB] OR cancerlit [TIAB]) OR (reference list* [TIAB] OR bibliograph* [TIAB] OR hand-search* [TIAB] OR “relevant journals” [TIAB] OR manual search* [TIAB]) OR ((“selection criteria” [TIAB] OR “data extraction” [TIAB]) AND “Review” [PT])) NOT (“Comment” [PT] OR “Letter” [PT] OR “Editorial” [PT] OR (“Animals” [MeSH] NOT (“Animals” [MeSH] AND “Humans” [MeSH])))	979
Exclusion 1: Vaccination against infection not studied	590
Exclusion 2: Study outcome was not about vaccine efficacy/effectiveness	170
Exclusion 3: Patients were not immunocompromised	120
Exclusion 4: Primary studies were not systematically reviewed	45
Included in final review	54