Asia outbreaks prompt question: Is all Zika dangerous?
Zika's rampage last year in Brazil caused an explosion of infections and inflicted a crippling neurological defect on thousands of babies – an effect never seen in a mosquito-borne virus.

It also presented a mystery: why had a virus that had been little more than a footnote in the annals of infectious diseases taken such a devastating turn in the Americas? How had Africa and Asia, where Zika had quietly circulated for decades, escaped with no reports of major outbreaks or serious complications?...
http://www.reuters.com/article/us-health-zika-asia-analysis-idUSKBN13I0AF
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