Researchers evaluated the impact of financial incentives, public health video messages, and access to a vaccine scheduling link on Covid-19 vaccination intentions and vaccine take-up in the United States. None of the interventions led to increases in vaccine take-up after thirty days. In a subsequent study, researchers found that personal reminder messages led to increases in booster vaccination rates while monetary incentives had no additional impact.

By running a Facebook public health campaign, researchers found that social media messaging from doctors and nurses reduced holiday travel and subsequent Covid-19 infection rates. This suggests that social media campaigns may be an impactful and cost-effective way to slow the spread of Covid-19 and enact behavior change.

Diarrhea is a leading cause of death in children under the age of 5, but adding small amounts of chlorine into water can treat water and prevent a large number of these deaths. Providing free dispensers for chlorine to treat water reduced under-five mortality. Children living in villages with dilute chlorine solution dispensers were 63 percent less likely to die relative to the comparison group.

Researchers partnered with bKash, one of the leading mobile money providers in Bangladesh, to evaluate the impact of targeted training programs on mobile banking uptake among migrant households. Training increased migrants’ and their families’ adoption of mobile banking, with women adopting the technology at similar rates to men, shrinking the gender gap.