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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Summer days may be waning, but health officials are still on high alert for new cases of chikungunya, a painful mosquito-borne virus that spread to the United States from the tropics earlier this year. ...
Sep 18, 2014
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