The Zika virus has spread rapidly through the Americas, sparking alarm over the possible link between the virus and the birth defect microcephaly. Though the disease causes minor symptoms for most people who are infected, the potential consequences for pregnant women and their unborn children have prompted travel warnings from health officials. But how precisely do mosquitoes spread Zika so quickly, and how many people can they infect? We broke it down for you:

More info: time.com

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