Florida state health officials say more than 200 people have contracted Dengue Fever, making it the largest outbreak of the mosquito-borne disease in about 90 years.

What we know: People with Dengue can experience flu-like symptoms, but severe cases can cause intense pain and even death.

Penn State biology professor Beth McGraw says this year's long, wet summer, which created a perfect breeding ground, combined with a resistance to insecticides on the market that therefore haven't worked as well as they used to.