A Philadelphia high school student was found to have tuberculosis.
The unidentified Frankford High School student tested positive for the bacterial infection after checking into a city hospital, officials say.
The hospital notified the Philadelphia Health Department who then made the school district aware.
Officials say students and staff who've shared a classroom with the teen are being tested as a precaution, but no additional cases have been found.
The district also sent a letter to the entire school community notifying them of the case.
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