A study in Nature Human Behaviour explores the role of behavioral science in addressing vaccine hesitancy and improving immunization rates. The research identifies key psychological and social factors influencing vaccine decisions, such as trust in institutions, risk perception, and social norms. It highlights the effectiveness of interventions like tailored messaging, nudges, and leveraging social influencers to encourage vaccine uptake. The findings suggest that integrating behavioral insights into immunization programs can enhance their impact, particularly in diverse cultural contexts. Policymakers and practitioners are encouraged to adopt evidence-based behavioral strategies to strengthen vaccine acceptance and coverage.