This cluster of papers explores various aspects of breastfeeding, including its epidemiology, mechanisms, and lifelong effects on both maternal and child health. It covers topics such as the impact of breastfeeding on infant and child mortality, cognitive development, infectious diseases, maternal health outcomes, and the duration of exclusive breastfeeding. Additionally, it delves into factors influencing breastfeeding practices, interventions to promote breastfeeding, and the relationship between breastfeeding and long-term health outcomes.