Dengue fever cases are rising in the US: What is it?

Story at a glance

• Cases of dengue fever are three times higher in the U.S. than this time last year and have been reported in 38 states and Washington, D.C.

• Dengue fever is a viral infection caused by infected mosquitoes.

• It causes fevers, headaches and nausea in mild cases, while those infected for a second time can experience more severe symptoms like persistent vomiting, bleeding gums or nose and severe abdominal pain.