"Immigrants overall have much lower per capita health care expenditures than native-born Americans..."

"...and recent analyses indicate that they contribute more to the economy in taxes than they receive in public benefits. In a study from the RAND Corporation, researchers estimated that undocumented adult immigrants, who make up about 3.2% of the population, account for only about 1.5% of U.S. medical costs."

Susan Okie, M.D
"Immigrants and Health Care — At the Intersection of Two Broken Systems"
The New England Journal of Medicine, August 9, 2007.