New drug-resistant strains of the parasite that causes malaria tend to evolve in regions with lower malaria risk; in areas with high transmission rates, they get outcompeted by the more common, drug-sensitive strains inside the human host. In high-transmission settings, it takes a long time for drug-resistant strains to take hold, but once they do, they can spread rapidly, according to a new study.
from Top Health News -- ScienceDaily https://ift.tt/2PtafM2
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