After indicates MCV1 from the survey round immediately after the SIA round; Before, MCV1 from the survey round immediately before the SIA round; During, MCV1 from the survey round that also collected SIA coverage; MCV1, routine measles-containing vaccine, first dose; SIA, supplementary immunization activities. A point located above the diagonal line indicates MCV1 θ being greater than SIA θ. Each point represents a pairwise relationship between adjacent wealth quintiles (eg, pair of coverage for quintile II and coverage of quintile III).