The Supreme Court heard arguments today on whether the Americans with Disabilities Act applies to people who are HIV-positive. The case involves a dentist who restricted treatment for a patient who has HIV, but no symptoms of AIDS. The dentist said he would fill a cavity for the woman, but only in a hospital, which would be more expensive than doing it in his office. The American Dental Association says HIV-infected patients can treated safely in dental offices—but the group supports the dentist in saying HIV-infected people should not necessarily be considered disabled. NPR's Nina Totenberg reports.