US CDC reported a higher-than-expected number of dengue cases among US travelers and declared a public health emergency in Puerto Rico, where the virus is endemic. Global infections in 2024 have reached a record high.
Dengue is spread by the Aedes aegypti mosquito. It's endemic in over 100 countries, including US territories like Puerto Rico, with over 34,000 locally acquired cases reported in the US from 2010-2023.
Locally transmitted dengue cases have been reported in states with warm climates like Florida, Texas, Hawaii, and Arizona. Puerto Rico has the perfect climate for dengue, leading to the majority of cases in the US.
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