New Incentives uses a cost-effective, evidence-based approach to increase routine childhood vaccinations in northern Nigeria, a region with some of the highest child mortality rates and lowest childhood vaccination rates in the world. Working within government clinics and in conjunction with existing programs, New Incentives provides small cash incentives to caregivers after their infant has received the latest round of vaccinations while also raising awareness about vaccinations and supporting vaccine supply efforts. A randomized controlled trial has shown that its program increases the rate of fully immunized children by 27 percentage points. Charity evaluator GiveWell ranks New Incentives as one of its top charities.