Several blogs discuss World Malaria Day, which takes place on April 25 each year. Katie Leach-Kemon of the Institute for Health Metrics and Evaluation examines the impact of malaria using visualizations in Humanosphere (4/25). In the PLOS “Speaking of Medicine” blog, Estrella Lasry of Médecins Sans Frontières discusses surveillance measures taken by the organization to prevent malaria outbreaks in emergency situations (4/25). Ashley Chang of the U.S. Global Leadership Coalition writes in the group’s blog about cooperation and progress in the fight against malaria (4/25). Lesley Reed of PATH writes in the organization’s blog about PATH’s vaccine portfolio and malaria efforts (4/25). PSI’s “Impact” blog features a post on the group’s efforts to control malaria vectors (4/25). And the ONE blog publishes a guest post by Alan Magill, director of the malaria program at the Bill & Melinda Gates Foundation (4/25).