A systematic literature review of missed opportunities for immunization in low- and middle-income countries

Highlights:

•First systematic review of missed opportunities for immunization (MOI) since 1993;

•Study assessed children and women of childbearing age in lower income countries; •MOI prevalence was 32% among children and 47% among women;

•MOI prevalence was similar in every region and did not change over the study period;

•Reasons for MOI were extensive precluding standardized solutions.