Fear of more dangerous second Zika, dengue infections unfounded in monkeys

An initial infection with dengue virus did not prime monkeys for an especially virulent infection of Zika virus, according to a study at the University of Wisconsin-Madison. Nor did a bout with Zika make a follow-on dengue infection more dangerous.

As outbreaks on Pacific islands and in the Americas in recent years made Zika virus a pressing public health concern, the Zika virus’s close similarity to dengue presented the possibility that one infection may exacerbate the other.


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