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Source: https://www.sfgate.com/bayarea/article/tuberculosis-san-francisco-school-21324492.php
Over 50 latent tuberculosis cases detected at SF high school
By Gillian Mohney, News EditorJan 30, 2026
San Francisco health officials sent out an advisory on Thursday after dozens of people at a high school were found to have the latent form of tuberculosis, or TB.
The San Francisco Department of Public Health’s advisory alerted health care providers to the outbreak centered at Archbishop Riordan High School and warned them to look for signs of TB infection in people affiliated with the school. According to the advisory, over 50 people in the school community have tested positive for latent TB, and three people have had active TB.
TB can be either active or latent. When active, TB causes symptoms and can lead to infection in others. When it’s latent, the disease does not develop symptoms and isn’t transmissible to others. Latent TB can turn into active TB at any time.
The first positive test for active TB at the school was reported in November...
Over 50 latent tuberculosis cases detected at SF high school
By Gillian Mohney, News EditorJan 30, 2026
San Francisco health officials sent out an advisory on Thursday after dozens of people at a high school were found to have the latent form of tuberculosis, or TB.
The San Francisco Department of Public Health’s advisory alerted health care providers to the outbreak centered at Archbishop Riordan High School and warned them to look for signs of TB infection in people affiliated with the school. According to the advisory, over 50 people in the school community have tested positive for latent TB, and three people have had active TB.
TB can be either active or latent. When active, TB causes symptoms and can lead to infection in others. When it’s latent, the disease does not develop symptoms and isn’t transmissible to others. Latent TB can turn into active TB at any time.
The first positive test for active TB at the school was reported in November...