![Dengue Fever Declares Public Health Emergency in Puerto Rico with 549 Cases Reported This Year, Aedes aegypti Mosquito is Primary Spreader and There are No Known Cures or Vaccines for It.](https://cdn.abcotvs.com/dip/images/14576746_dengue.jpg?w=1600)
Puerto Rico has declared a public health emergency over dengue fever after reporting 549 cases so far this year, which is a 350% increase compared to the previous five years. The Aedes aegypti mosquito is thought to be the primary spreader of dengue throughout the Americas and there are no known cures or vaccines for it. Dengue can cause crushing headaches, fever, vomiting, rash and other symptoms that may lead to plasma leakage and death in severe cases. The virus has affected more than 5 billion people worldwide with nearly 80% of them occurring in the Western Hemisphere. Health experts suggest an essential tactic to fight against mosquitoes is as simple as removing stagnant water, applying bug spray and wearing protective clothing.