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Childhood malariaUnderstanding how changes in community parasite prevalence alter the rate and age distribution of severe malaria is essential for optimizing control efforts. Paton et al. assessed the incidence of pediatric severe malaria…

Female Anopheles mosquitoes transmit malaria sporozoites to humans in the context of a blood meal. In malaria-endemic areas, most of the ensuing infections are asymptomatic. Some, however, progress to an uncomplicated illness (fever,…

Science's COVID-19 reporting is supported by the Heising-Simons FoundationSome people might want to know their susceptibility to severe COVID-19 before venturing into crowds.PHOTO: APU GOMES/AFP/GETTY IMAGESFor people not yet vaccinated…