Rio de Janeiro promised stepped-up measures to eradicate Zika virus-carrying mosquitoes at Olympic venues before the Games start in six months, amid a regional health scare. Zika, which is transmitted by mosquitoes, has been blamed for causing serious birth defects if a mother is infected during pregnancy. A dramatic growth in incidents across Latin America, notably in Brazil, has prompted governments to warn pregnant women about traveling to the region — a sensitive topic as Rio prepares to become the first South American city to host the Summer Games, starting August 5.
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Rio steps up Zika fight in Olympics run-up
