The World Health Organization announced Thursday that it has convened an emergency committee to try to find ways to identify, treat and stop the transmission of the Zika virus, which officials say is "spreading explosively" across the Americas.
"The level of alarm is extremely high, as is the level of uncertainty. Questions abound. We need to get some answers quickly, " Margaret Chan, the director-general of the WHO, said in a briefing to member countries in Geneva.
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