Dengue: Puerto Rico declares public health emergency --information about the disease

Here's what to know about dengue, as Puerto Rico declares a public health emergency Most people with dengue will show no signs of infection or experience only mild symptoms, but in rare cases infections can become severe and potentially fatal. NPR

Puerto Rico has issued a public health emergency after recording an unusually rapid rise in dengue cases over the first few months of this year.

It's the latest area to grapple with a surge of infections of the mosquito-borne disease, which sickens an estimated 100–400 million people globally each year.

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