Observational study: Seasonal malaria chemoprevention in localities in west and central Africa was associated with a remarkable reduction in morbidity and mortality from the disease 10 Dec, 2020 | 08:54h | UTC Effectiveness of seasonal malaria chemoprevention at scale in west and central Africa: an observational study – The Lancet Commentary: Monthly drug during rainy season prevents malaria deaths in African children – London School of Hygiene & Tropical Medicine