By James Gallagher Health editor, BBC News website
More than two billion people live in parts of the world where the Zika virus can spread, detailed maps published in the journal eLife show.
The Zika virus, which is spread by Aedes aegypti mosquitoes, triggered a global health emergency this year.
Last week the US Centers for Disease Control and Prevention confirmed that the virus causes severe birth defects.
The latest research showed mapping Zika was more complex than simply defining where the mosquito can survive.
One of the researchers, Dr Oliver Brady from the University of Oxford, told the BBC: “These are the first maps to come out that really use the data we have for Zika – earlier maps were based on Zika being like dengue or chikungunya.