This PDF file includes:

• Survey instruments
• Additional results
• Fig. S1. Beliefs about Zika (experimental data).
• Table S1. Study summaries.
• Table S2. Sample statistics.
• Table S3. Treatment effects on Zika beliefs (experimental data).
• Table S4. Treatment effects on Zika attitudes and behavioral intentions.
• Table S5. Correction effects in 2017 Zika experiment (ordered probit).
• Table S6. Treatment effects on Zika beliefs and attitudes (conspiracy predispositions).
• Table S7. Treatment effects on Zika beliefs and attitudes (confidence in government).
• Table S8. Treatment effects on Zika beliefs and attitudes (confidence in Ministry of Health).
• Table S9. Treatment effects on Zika beliefs and attitudes (confidence in medicine).
• Table S10. Treatment effects on Zika beliefs and attitudes (confidence in scientists).
• Table S11. Correction effects on other Zika beliefs in 2017 Zika experiment.
• Table S12. Correction effects on Zika beliefs and attitudes after delay.
• Table S13. Treatment effects on Zika attitudes and behavioral intentions.
• Table S14. Correction effects in 2018 Zika experiment (ordered probit).
• Table S15. Treatment effects on Zika beliefs and attitudes (conspiracy predispositions).
• Table S16. Treatment effects on Zika beliefs and attitudes (confidence in government).
• Table S17. Treatment effects on Zika beliefs and attitudes (confidence in Ministry of Health).
• Table S18. Treatment effects on Zika beliefs and attitudes (confidence in medicine).
• Table S19. Treatment effects on Zika beliefs and attitudes (confidence in scientists).
• Table S20. Correction effects on other Zika beliefs in 2018 Zika experiment.
• Table S21. Treatment effect on perceived ability to discern truth about health/science.
• Table S22. Treatment effects on yellow fever attitudes and behavioral intentions.
• Table S23. Correction effects in 2018 yellow fever experiment (ordered probit).
• Table S24. Treatment effects on yellow fever beliefs and attitudes (conspiracy predispositions).
• Table S25. Treatment effects on yellow fever beliefs and attitudes (confidence in government).
• Table S26. Treatment effects on yellow fever beliefs and attitudes (confidence in Ministry of Health).
• Table S27. Treatment effects on yellow fever beliefs and attitudes (confidence in medicine).
• Table S28. Treatment effects on yellow fever beliefs and attitudes (confidence in scientists).
• Table S29. Treatment effect on perceived ability to discern truth about health/science.
• Table S30. Correction effects on other Zika beliefs by pre-experiment response time.
• Table S31. Correction effects on other Zika beliefs by experimental response time.
• References (41–43)

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