Chagas disease is transmitted to humans by blood-sucking insects, like mosquitoes. Tropical disease experts say the spread of Chagas towards the U.S. is similar to the spread of HIV.
Just like the AIDS virus, Chagas disease has a long incubation time and is hard or almost impossible to cure. It infects up to eight million people mostly in Bolivia, Mexico, Colombia, and Central America. But more than 3,000 of those people who are infected live in the U.S. with most of them being immigrants.