 This study found that hand washing with soap and water is important for reducing the risk of contracting COVID-19. The authors suggest that messages about the importance of hand washing should be emphasized alongside other preventive measures such as wearing face masks and maintaining physical distance. Additionally, the study highlights the need to consider resource differences when developing behavioral interventions in different countries. This article was authored by Bolano Olapaju, Zoe Mistral-Hendrickson, Joseph G. Rosen, and others.