Increasing adherence to COVID-19 guidelines: Lessons from rigorous evidence

This note provides some general lessons on increasing uptake of healthy behaviors and on improving the delivery of health products and services. These lessons draw from the results of recent randomized evaluations on strategies to increase adherence to Covid-19 prevention guidelines, increasing take-up of the Covid-19 vaccines, and from the results of randomized evaluations on increasing take-up of healthy behaviors more generally.