*Appendix A.2. Full Search Strategy*

Keywords: "Routine Immunization"[TIAB] OR "Vaccination\*"[TIAB] OR "Vaccination Coverage"[TIAB] OR "Childhood Vaccination"[TIAB]

AND

Urban OR Peri-urban OR City OR "Urban center" OR "urban slum"

AND

India OR Nigeria OR Indonesia OR Ethiopia OR Philippines OR "Democratic Republic of the Congo" OR Brazil OR Pakistan OR Angola OR Myanmar OR United Republic of Tanzania OR Mozambique OR Afghanistan OR Somalia OR Mexico OR Madagascar OR Cameroon OR Democratic People's Republic of Korea OR Chad OR Viet Nam

PubMed

(("Routine Immunization"[Title/Abstract] OR "vaccination\*"[Title/Abstract] OR "Vaccination Coverage"[Title/Abstract] OR "Childhood Vaccination"[Title/Abstract]) AND ("Urban"[Title/Abstract] OR "Peri-urban"[Title/Abstract] OR "City"[Title/Abstract] OR "Urban center"[Title/Abstract] OR "urban slum"[Title/Abstract]) AND ("India"[Title/ Abstract] OR "Nigeria"[Title/Abstract] OR "Indonesia"[Title/Abstract] OR "Ethiopia"[Title/ Abstract] OR "Philippines"[Title/Abstract] OR "Democratic Republic of the Congo"[Title/ Abstract] OR "Brazil"[Title/Abstract] OR "Pakistan"[Title/Abstract] OR "Angola"[Title/ Abstract] OR "Myanmar"[Title/Abstract] OR "united republic of tanzania"[Title/Abstract] OR "Mozambique"[Title/Abstract] OR "Afghanistan"[Title/Abstract] OR "Somalia"[Title/ Abstract] OR "Mexico"[Title/Abstract] OR "Madagascar"[Title/Abstract] OR "Cameroon" [Title/Abstract] OR "democratic people s republic of korea"[Title/Abstract] OR "Chad" [Title/Abstract] OR "viet nam"[Title/Abstract])) AND (2020/3/1:2023/2/3[pdat])

Result = 321

Web of Science

AB = ("Routine Immunization" OR "Vaccination\*" OR "Vaccination Coverage" OR "Childhood Vaccination") AND AB = (India OR Nigeria OR Indonesia OR Ethiopia OR Philippines OR "Democratic Republic of the Congo" OR Brazil OR Pakistan OR Angola OR Myanmar OR United Republic of Tanzania OR Mozambique OR Afghanistan OR Somalia OR Mexico OR Madagascar OR Cameroon OR Democratic People's Republic of Korea OR Chad OR Viet Nam) AND AB = (Urban OR Peri-urban OR City OR "Urban center" OR "urban slum") March 2020 to Feb 2023

Result = 287



*Vaccines* **2023**, *11*, 809


#### *Vaccines* **2023**, *11*, 809

