New from CDC: Learn about the growing threat of diseases from mosquito, tick and flea bites in the U.S.
From 2004 to 2016, more than 640,000 cases of vector-borne diseases like dengue, Zika, Lyme and plague were reported, and 9 new germs spread by bites from infected mosquitoes and ticks were discovered or introduced in the U.S. Better control of mosquitoes and ticks is needed to protect people from these costly and deadly diseases.