Grant High School in Sacramento is releasing the findings of Friday's tuberculosis screenings.
345 students and staffers were tested after a student was diagnosed as having active TB back in February. Testing of those who had direct contact was done in the spring.
This month's tests included students who attended classes in the same room as the infected patient, but not at the same time. 14 percent of those have tested positive for exposure. They'll be given X-rays and preventive treatment.
Another 130 students and staff volunteered for screenings. Their exposure rate is 5 percent.
At this time, there are no known infectious students or staff at the school and no evidence of any exposures after March 2014.