• Harapan Harapan, Noelle Shields, Aparna G Kachoria, Abigail Shotwell, and Abram L Wagner.
• Medical Research Unit, School of Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia.
• Am J Prev Med. 2021 Jan 1; 60 (1 Suppl 1): S44-S52.

IntroductionSome Muslim religious councils in Indonesia have ruled that measles vaccines contain haram (i.e., forbidden materials). This study evaluates the changes in measles vaccination coverage between 1991 and 2017 and compares vaccination coverage between Muslims and non-Muslims in Indonesia.MethodsA total of 7 cross-sectional in-person surveys of mothers in 1991-2017 in Indonesia were analyzed in 2019. Participants were asked about religion in 1991-2007, and 100 data sets of religion were imputed for 2012 and 2017. In this multiple imputation analysis, binomial regression models output prevalence differences adjusted for wealth, education, child's sex, and mother's age. A quadratic term for year (year X year) and an interaction term between year and religion evaluated changes in vaccination over time by religion.ResultsThe 7 data sets included 23,106 children aged 12-23 months, with the proportion of those who were Muslims ranging between 85% and 89% across the survey years. Between 1991 and 2017, measles vaccination coverage increased from 57% to 79% among non-Muslims and from 59% to 79% among Muslims. In the multivariable regression model, measles vaccination coverage increased by 1.6% each year (with a quadratic term of -0.05%, indicating some leveling over time). At baseline in 1991, non-Muslims had a vaccination coverage of 6.2% higher than that of Muslims, but this disparity decreased by -0.2% each year.ConclusionsMeasles vaccination increased in both Muslims and non-Muslims in Indonesia but has stagnated in recent years. Because of increased attention among Muslim groups on haram materials in vaccines since 2017, future studies should continue to examine the relationship between religion and vaccine uptake in Indonesia.Supplement InformationThis article is part of a supplement entitled Global Vaccination Equity, which is sponsored by the Global Institute for Vaccine Equity at the University of Michigan School of Public Health.Copyright © 2020 American Journal of Preventive Medicine. Published by Elsevier Inc. All rights reserved.

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