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Three Brazilian cities at higher dengue risk during Fifa World Cup

PARIS: Three Brazilian host cities — Fortaleza, Natal and Recife — are at higher risk than the other nine of a dengue fever outbreak during the World Cup, scientists said on Saturday. In absolute terms, the risk is low in all event venues, but comparatively greater in the three northeastern cities and authorities should beef up steps to prevent an outbreak, they said. A potentially dangerous fever caused by a virus for which there is no vaccine or cure, dengue is transmitted by the Aedes aegypti mosquito when it takes a blood meal. Doctors last year…