Brazil's authorities on Tuesday reported the first domestically contracted cases of the mosquito-borne chikungunya virus, prompting the government to announce it was stepping up attempts to control the disease.
Sep 17, 2014
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The worst-ever Ebola outbreak has killed more than 2,400 people, the UN said Friday, as Cuba pledged the largest foreign medical team deployed so far in the west African health crisis.
Sep 12, 2014
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