This research is part of the entertainment-education program of the World Bank’s Development Impact Department (DIME). Computational replicability was verified by DIME Analytics. The authors thank the study partners at Facebook’s Campaigns for a Healthier World initiative and Upswell, in particular, Nisha Deolalikar, Sarah Francis, and Drew Bernard. The authors also thank Malaria No More for their collaboration, as well as attendees at CEGA-DIME Measuring Development Conference, Centro de Investigacion y Docencia Economicas seminar, Columbia Business School seminar, Marketing Science Annual Conference, Marketing Science DEI Conference, MIT’s Annual Conference on Digital Experimentation, Quantitative Marketing and Economics Conference, SSRC Workshop on the Economics of Social Media, Universitat Autonoma de Barcelona seminar, and Yale School of Management seminar for helpful comments and discussions. The paper only reflects the opinion of the authors and not the opinion of any organizations. All remaining errors are the responsibility of the authors. The research received ethical clearance from the Columbia University Institutional Review Board (AAAU6317).