Pam Meredith reports on Twitter (pam_NurseEditor):

Sen. Edward "Ted" Kennedy was taken to Washington Hospital Center in D.C. after collapsing at luncheon after the swearing-in ceremony. She reports he is up and talking post seizure. CNN reports that the seizure was brought on by exhaustion. Sen. John Kerry reports that Kennedy's "Irish dander is up."

Sen. Robert Byrd is fine after having to leave the luncheon. News reports say he was upset after witnessing his friend Kennedy's convulsions.

The medical aid stations set up along the Mall saw a number of patients. Most conditions treated were not serious. More than half of the complaints were related to the cold temperatures. About 60% of patients were older than 65. The aid stations began demobilizing around 5 p.m., once most of the people had left the Mall and headed to the parade route.

As the parade continues, one challenge is that people needing medical help cannot cross Pennsylvania Avenue to obtain it.