DENVER -- Spring break revelers can relax -- the chances of you having the swine flu are extremely remote.

That's what officials at the University of Colorado are going to let students know this week.

The university will hold a meeting Sunday night with health officials, pandemic outbreak planners and administrators to determine what course of action to take and how much public communication is needed.

University spokesman Bronson Hilliard said there have been no cases reported at the Boulder campus.

CU's spring break was four weeks ago. The Colorado Department of Health and Environment said the confirmed cases of the virus as a result of travel were from travel to Mexico in mid-April.

The U.S. declared a public health emergency Sunday to deal with the emerging new swine flu, much like the government does to prepare for approaching hurricanes.

Officials reports 20 U.S. cases of swine flu in five states so far, with the latest in Ohio and New York. Unlike in Mexico where the same strain appears to be killing dozens of people, cases in the United State have been mild -- and U.S. health authorities can't yet explain why.

There are no documented cases of the swine virus in Colorado, but the state has established an emergency operation center at the state department of health.

"The operation center will be open everyday from six to 10 to assist local health departments, medical personnel and hospitals," said Governor Bill Ritter.

The situation will be monitored from the operation center. As of Sunday, the health department said no hospital has seen an increase of flu-like illnesses in the state.

"We are asking all individuals with mild flu illnesses to stay home, regardless of travel history," said Dr. Ned Calogne, Colorado Chief Medical Officer of the Colorado Department of Health and Environment. "Children or adolescents with fever should not go to daycare or school. Adults with fever should not go to work until their symptoms resolve."

Travel to Mexico is not prohibited, but strongly discouraged.

"Until we get to the point of having a travel advisory from a nationwide standpoint I would tell people it might be prudent to consider postponing that travel," said Calogne.