Low-income countries face many health and development challenges. In response to these challenges, world leaders have taken counter action and formulated the Millennium Development Goals (MDGs), one of which (MDG4) was to reduce the mortality of children younger than 5 years by two-thirds by 2015. In Ethiopia, under-5 mortality was 166 deaths per 1000 livebirths in 2000,1 one of the highest in the world. However, by 2016, after 15 years of successful effort, under-5 mortality had decreased to 67 deaths per 1000 livebirths.2 The achievement of MDG4 in Ethiopia is proof that tailored health and health-related interventions and strategies can be successfully implemented in poorly resourced settings.3 Yet one of the challenges in countries like Ethiopia is understanding how countries progress in achieving the MDGs. It is imperative to systematically document the lessons from countries that have already successfully achieved the MDGs. This will enable other countries to emulate the experiences of these countries and replicate them to solve the same challenge or other health problems in different or similar settings.