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May 24, 2017
Genetic analysis of samples collected as the Zika virus (ZIKV) spread throughout the Americas after its introduction in 2013 or 2014 has shown that the virus circulated undetected for up to a year in some regions before it came to the attention of public health authorities. Genetic sequencing has also enabled scientists to recreate the epidemiological and evolutionary paths the virus took as it spread and split into the distinct subtypes—or clades—that have been detected in the Americas. The research, published in Nature today, was supported in part by the National Institute of Allergy and Infectious Diseases (NIAID), part of the National Institutes of Health.


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