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Deadliness of West Nile virus explained

发布时间:2019-03-02 08:10:05来源:未知点击:

A single genetic mutation might explain why West Nile virus has, within a decade, switched from causing relatively mild infections in humans to outbreaks of deadly encephalitis. The virus, which can pass to humans via mosquitoes that feed on infected birds, didn’t pose a serious threat until the mid-1990s, when outbreaks of deadly infection sprang up in Israel, Romania, Russia and eventually North America. Aaron Brault and colleagues at the University of California, Davis,