A course of antibiotics for TB is nothing like taking them for strep throat or a simple bladder infection. It is a 9 month long course of treatment and the drugs are much nastier than amoxicillin or something like that. TB drugs have numerous unpleasant side effects. I feel very sorry for the students placed in that situation.
Yep, this happened a couple of years ago. The department of health guy stated on the news that people exposed would be on antibiotics for months.