New data shows 18%, or nearly 1 in 5, of tested students and staff at Archbishop Riordan High School in San Francisco were diagnosed with either latent or active tuberculosis during an outbreak that started in November. New testing is scheduled to start today. In total, 96% of the school community was tested, seven people were diagnosed with active cases during the course of the outbreak and 241 latent cases were reported, according to data released by the San Francisco Department of Public Health on April 27 to the school community. In February, four active cases and three suspected active...