Bloomberg: Dengue fever, a potentially deadly virus usually found in the tropics, could begin spreading widely in the U.S. as mosquitoes that transmit the disease move into more states, according to two leading epidemiologists. The disease has already struck Hawaii, Texas and Puerto Rico after decades of absence in the U.S., Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, and colleague David Morens write in the Jan. 9 Journal of the American Medical …