Central Ohio health authorities continue to work with exposure to swine flu at the Ohio State University Medical Center.
Columbus Health Department officials say they're still trying to determine how many people came in contact with the Ohio State University employee who has a probable case of swine flu. Health Department physician Mysheika LeMaile-Williams says the employee may have been in contact with more than 50 people including five Columbus firefighters.
City health commissioner Teresa Long says those people are taking the anti-viral drug Tamiflu.
LeMaile-Williams says two or three of them exhibit symptoms of influenza and are quarantined.
None of the five Columbus firefighters is showing symptoms of flu; all are back on the job.