Vector-Borne Diseases in the United States, 2004-2018

Almost everyone has been bitten by a mosquito, tick, or flea. These can be vectors for spreading pathogens (germs). A person who gets bitten by a vector and gets sick has a vector-borne disease, like dengue, Zika, Lyme disease, or plague.

Disease cases more than doubled between 2004 and 2018. Find out what’s happening in your state.