India, June 8 -- Climate change could expand chikungunya risk into parts of North America, Europe and East Asia by the end of the century, a new study says.

The mosquito-borne disease is currently concentrated mainly in tropical and subtropical regions.

Researchers say warming temperatures could allow Aedes mosquitoes to survive in areas previously too cold for sustained transmission.

North-eastern North America, central Europe and East Asia have been identified as emerging risk zones.

The study says countries in temperate regions should strengthen mosquito surveillance and clinical diagnosis before 2040.

Climate change could expand the risk of chikungunya into parts of North America, Europe and East Asia by the end of the century, a...