A dengue fever alert has been issued in the Florida Keys following two confirmed cases of the mosquito-borne illness. The local warning comes a week after the Centers for Disease Control and Prevention issued a national advisory about the increased risk of dengue virus infections in the United States.
Dengue infections are on the rise as many nations have reported increasingly hot temperatures, which create ideal conditions for the mosquitoes that spread dengue to hatch en masse and carry higher amounts of the virus. About one in four people who get infected with the dengue virus will get sick, according to the CDC. Among those who get sick, the symptoms can be mild or severe.
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