According to scientists writing in The Lancet Infectious Diseases, More than two billion people could be at risk from Zika virus outbreaks in parts of Africa and Asia, and Populations in India, Indonesia and Nigeria are some of the most vulnerable to transmission, the researchers said. They used data on air traveler numbers to help model their predictions, according to a BBC report, adding that However, they acknowledge that immunity to the virus could already exist in some areas and could reduce the risk.

The research team, from the London School of Hygiene and Tropical Medicine, Oxford University and the University of Toronto, Canada, said “vast numbers” of people were living in environments where it would be hard to prevent, detect and respond to the virus, and They looked at factors such as the numbers of people who traveled from Zika-affected areas in South America to Africa and Asia, the presence of mosquitoes that can pass on the virus, and the climate in the regions to assess which countries could be most at risk from an outbreak.

Co-study author and research fellow in mathematical modeling at the London School of Hygiene & Tropical Medicine, Dr. Oliver Brady, said: “Countries such as India, Indonesia and Nigeria are predicted to be at highest risk of Zika introduction with up to 5,000 passengers a month arriving from Zika endemic areas, adding that “Should Zika be imported into these areas the impact on their health systems could be very severe.”

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