Scientists are warning that the most effective drug used to treat malaria is becoming ineffective in parts of Southeast Asia – and unless rapid action is taken, it could lead to a global health emergency. Writing in the Lancet journal, researchers from Thailand’s Mahidol University and Britain’s Oxford University say parasites that carry malaria are developing resistance to a key drug combination across multiple regions of Cambodia, Laos, Thailand, and Vietnam. Henry Ridgwell reports.
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