Table 2.

Keywords and draft PMC search strategy for literature review on vaccine hesitancy

Intervention	Population	Outcome	PMC search details	Items (n) found in MEDLINE
Vaccination, vaccine, Immunisation, immunization	Diaspora, émigré, emigrant, foreigner, immigrant, migrant, refugee	Acceptance, uptake, confidence, trust, anxiety, doubt, mistrust, anti-vaccination, anti-vax, concern, distrust, misinformation, resistance, compulsory, dropout, MMR, skeptic, critic, exemption, objector, attitude, choice, fear, opposition, autism, controversy, hesitancy, perception, rumor, rumour, avoidance, decision, hesitation, phobia, awareness, delay, intention, refusal, belief, barrier, denial, knowledge, rejection, dilemma, behavior, behavior, misconception, mandatory, reluctancy	((((((vaccination) OR vaccine) OR immunization) OR immunisation)) AND (((((((emigre) OR emigrant) OR immigrant) OR migrant) OR refugee) OR diaspora) OR foreigner)) AND ((((((((((((((((((((((((((((((((((((((((((((((((((acceptance) OR anxiety) OR anti-vaccination) OR anti-vaxx) OR attitude) OR autism) OR avoidance) OR awareness) OR barrier) OR behavior) OR behaviour) OR concern) OR confidence) OR compulsory) OR controversy) OR choice) OR critic) OR delay) OR denial) OR decision) OR dilemma) OR distrust) OR doubt) OR dropout) OR exemption) OR fear) OR hesitancy) OR hesitation) OR intention) OR knowledge) OR mandatory) OR misconception) OR misinformation) OR mistrust) OR MMR) OR objector) OR opposition) OR perception) OR phobia) OR refusal) OR rejection) OR reluctance) OR resistance) OR rumor) OR rumour) OR skeptic) OR trust) OR uptake) AND (“1999/01/01”[PDat]: “2019/12/31”[PDat]))	6887

MMR, measles-mumps-rubella; PMC, PubMed Central.