Wednesday, February 10, 2016

Zika Virus: What Happened When

7:00:00 PM By

A lab worker exposes his arm to Aedes aegypti mosquitoes, which transmit Zika virus, during testing in the lab at Roosevelt Hospital in Guatemala City, Guatemala.
A lab worker exposes his arm to Aedes aegypti mosquitoes, which transmit Zika virus, during testing in the lab at Roosevelt Hospital in Guatemala City, Guatemala.
Saul Martinez/Bloomberg via Getty Images
Since it was first discovered in Uganda in 1947, Zika virus was known mostly as a short-lived and mild illness. In 2015, that all changed. An outbreak in Brazil is suspected of causing cases of a serious birth defect, microcephaly, and a potentially crippling disease, Guillain-Barre syndrome.
As the mosquito-borne illness spreads across the Americas, scientists are trying to figure out what illnesses the virus is truly responsible for and why more people are getting sick.
We've put together a timeline to track the global response to Zika virus and scientists' understanding of how it affects people, with the most recent events at the top. (

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