Brazil accounts for 83 percent of dengue cases in the Americas, Colombia reports another 20,000 chikungunya cases

The mosquito borne viral diseases of dengue fever and chikungunya are skyrocketing in some countries of South America this year. Of the 554,890 dengue fever cases in the Americas reported to date in 2015, 460,502 probable and confirmed cases have been reported in hard hit Brazil this year, or 83 percent of all cases. The number of ["]