San Francisco Confirms Three Active TB Cases at Archbishop Riordan High

The San Francisco Department of Public Health posted an update on February 20, 2026, saying it had confirmed three active cases of tuberculosis (TB) connected to Archbishop Riordan High School in San Francisco. The department described the situation as an outbreak centered at the school and characterized its posting as a continuing response.

SFDPH’s Feb. 20 statement identified the three cases as active infections of TB; the update framed the agency’s work as ongoing but did not list additional case counts beyond those three. The department’s posting was presented as part of its active public-health response to an outbreak centered at Archbishop Riordan High School in San Francisco County.

The Feb. 20 update from SFDPH focused on the department’s continuing response to the cluster at Archbishop Riordan High School. The public notice repeated that three active TB cases had been confirmed and indicated the department remained engaged in outbreak response activity in connection with the school community.

As of February 26, 2026, the February 20 message is the most recent public update available from the department about the Archbishop Riordan High School outbreak. San Francisco Department of Public Health officials posted the notice to inform the public that the agency had identified three active cases and that response efforts described in the update were ongoing.

City and county public-health officials have positioned the February 20 posting as the official account of the situation at Archbishop Riordan High School in San Francisco. The department’s confirmation of three active TB cases on that date marks the central, confirmed figure in the agency’s public communication about the outbreak.