How and when will we get to a Zika vaccine?

By Jen Christensen, CNN

Updated 2158 GMT (0558 HKT) February 12, 2016

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A pest control worker fumigates a school corridor on the eve of the annual national Primary School Evaluation Test in Kuala Lumpur on Sunday, September 4. Malaysia reported its first locally transmitted Zika case on September 3.
Photos: Zika virus outbreak
A pest control worker fumigates a school corridor on the eve of the annual national Primary School Evaluation Test in Kuala Lumpur on Sunday, September 4. Malaysia reported its first locally transmitted Zika case on September 3.
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A banner about Zika virus is seen as ferry passengers <a href="http://www.cnn.com/2016/09/05/health/zika-asia-threat/" target="_blank">arriving from Singapore</a> get in line at the immigration check on September 4, in Batam, Indonesia.
Photos: Zika virus outbreak
A banner about Zika virus is seen as ferry passengers arriving from Singapore get in line at the immigration check on September 4, in Batam, Indonesia.
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A banner is flown over the South Pointe Park area, Tuesday, September 6, in Miami Beach, Florida.
Photos: Zika virus outbreak
A banner is flown over the South Pointe Park area, Tuesday, September 6, in Miami Beach, Florida.
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A pest control worker fumigates drains at a local housing estate where the latest case of Zika infections were reported on Thursday, September 1, in Singapore.
Photos: Zika virus outbreak
A pest control worker fumigates drains at a local housing estate where the latest case of Zika infections were reported on Thursday, September 1, in Singapore.
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