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Study: Zika virus may have arrived in Brazil in 2013
Liz Szabo, USA TODAY 2:45 p.m. EDT March 24, 2016
The Zika virus may have arrived in Brazil up to two years before the first reported cases, a new study suggests.
The mosquito-borne virus may have reached Brazil between May and December 2013. Although Brazilian health officials noticed a cluster of illnesses marked by fever and rash in late 2014, they didn't officially diagnosed these patients with the little-known Zika virus until May 2015.
International travel could have spread Zika to Brazil from French Polynesia, which experienced a Zika outbreak from 2013 to 2014, according to an analysis of several Zika virus genomes published Thursday in Science.
Scientists can estimate when Zika entered a country by noting the location of reported cases, analyzing mutations in the virus and counting backward in time, based on how quickly mutations are known to occur.
...
http://www.usatoday.com/story/news/...-virus-may-have-arrived-brazil-2013/82210986/
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See also:
Report: Zika virus in the Americas: Early epidemiological and genetic findings
https://flutrackers.com/forum/forum...as-early-epidemiological-and-genetic-findings
Liz Szabo, USA TODAY 2:45 p.m. EDT March 24, 2016
The Zika virus may have arrived in Brazil up to two years before the first reported cases, a new study suggests.
The mosquito-borne virus may have reached Brazil between May and December 2013. Although Brazilian health officials noticed a cluster of illnesses marked by fever and rash in late 2014, they didn't officially diagnosed these patients with the little-known Zika virus until May 2015.
International travel could have spread Zika to Brazil from French Polynesia, which experienced a Zika outbreak from 2013 to 2014, according to an analysis of several Zika virus genomes published Thursday in Science.
Scientists can estimate when Zika entered a country by noting the location of reported cases, analyzing mutations in the virus and counting backward in time, based on how quickly mutations are known to occur.
...
http://www.usatoday.com/story/news/...-virus-may-have-arrived-brazil-2013/82210986/
-------------------------------------------------------------------------------------------------------
See also:
Report: Zika virus in the Americas: Early epidemiological and genetic findings
https://flutrackers.com/forum/forum...as-early-epidemiological-and-genetic-findings