Later Monday, health officials in Scotland said two cases of swine flu had been confirmed there.

Hundreds more cases are suspected, especially in Mexico, where as many as 103 deaths are thought to have been caused by the virus, the country's health minister said. More than 2,000 cases have been reported but not confirmed in the country.

Federal officials confirmed 20 new U.S. cases on Monday.

A federal official said they were at the same school in New York in which eight U.S. cases were confirmed earlier. More than 100 students at the school were out with flu-like symptoms last week.

The outbreak is a particular concern because of who it is hitting hard, United Nations Secretary-General Ban Ki-moon said Monday.

"We are concerned that in Mexico, most of those who died were young and healthy adults," he said.

President Obama said Monday that the swine flu outbreak is a "cause for concern and requires a heightened state of alert," but is not a "cause for alarm."

Courtesy of CNN.com