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Literature search strategy.
| Keywords used or in combination | Literature databases searched |
|---|---|
| Immunization, immunization, vaccination | Medline (PubMed and OVID search engines) |
| Urban | EMBASE |
| Peri-urban | Web of Science |
| Slum(s) | Sociological Abstracts |
| Maternal and child health | Soc Serv Abs |
| Intervention(s) | CINALH |
| Strategy/strategies | Cochrane Central Register of Controlled Trials |
| Challenge(s) | |
| Coverage | |
| Dropout | |
| Uptake | |
| Compliance | |
| Determinant(s) | |
| Health service(s) | |
| Primary health service(s) |
