WHO: Zika virus ‘spreading explosively

The World Health Organization announced Thursday that it will convene an emergency meeting to try to find ways to stop the transmission of the Zika virus — which officials said 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, director general of the WHO, said in Geneva in a briefing for member countries.

Chan said that the situation today is dramatically different from last year because of the multiplying number of cases and the severity of the symptoms.