For years, humanity was quietly winning the fight against malaria. Then a new mosquito arrived in Africa; one that thrives in cities, breeds all year round, and is already resistant to many of the insecticides we rely on.
@paddyney looks at how Anopheles stephensi has spread from Djibouti across Africa, why scientists are increasingly alarmed by it, and why this is happening just as funding for malaria prevention and surveillance is being cut.
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