Medicine: Animalcule Life

Malaria's cause is known: a tiny animalcule injected by a mosquito's sting. But no one knows what makes the disease so hard to cure permanently. Parasitologists think it is because the malaria bug knows how to hide: even when the bloodstream has been cleared by an antimalarial drug, the organism may remain in body tissues, lying low for new attacks. If scientists could grow the parasite in a test tube and find out exactly what makes it tick, they would be well along toward wiping out malaria.

Last week a team of Harvard...

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