The state has used a new laboratory testing procedure to confirm four additional cases of swine flu infection in Colorado, bringing the total to ten.
The new cases reported today are two elementary school-age children, from Adams and Jefferson counties, as well as a college-age man from Adams County and a Fremont County woman.
There were six cases confirmed earlier.
The Department of Public Health and Environment recommends that people who experience influenza symptoms should stay home for seven days after onset of symptoms or at least 24 hours after symptoms have resolved, whichever is longer.