SAN FRANCISCO (KGO) — A third confirmed active case of tuberculosis is forcing Archbishop Riordan High School in San Francisco to cancel classes on Friday and halt in-person classes next week. Many sporting events have also been canceled.

Students and teachers are now in the midst of the alarming outbreak.

“Yeah, you know it’s kind of crazy because it reminds me a bit of COVID,” said Julia O’Neill, a student at Riordan High School.

In a letter to families at Riordan, the school president announced that next week, teachers will be posting student assignments online. From February 9-20, the school will move to a hybrid option where students who test negative will be allowed to attend classes on campus.

“I’m okay with it because Riordan is trying their best to make sure that we’re safe,” said freshman Emma O’Neill. “We’re having online school for like a week, so everyone can get their tests, which I think is a really good decision to make.”

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School leadership is working with the city’s public health department on contact-tracing. They hope to get everyone tested by February 13.

In addition to the three active TB cases, they’ve already identified 50 cases of latent infection, meaning the individuals are infected but have no symptoms.

As for being worried, the students who spoke with ABC7 News said they feel safe.

“A tiny bit, I know the school has been keeping everyone informed,” said senior Ashling Greene.

The school’s first case of TB was back in November, but then came the holiday break.

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“The problem with TB is it can take a long time to incubate in some people, anywhere from two to 10 weeks,” said Dr. Peter Chin-Hong, an infectious disease expert at UCSF. “What might have happened is they checked a lot of back in November, and some people were maybe falsely negative, but it hadn’t incubated yet, and then they got active disease maybe over the holidays.”

Dr. Chin-Hong says there are about 100 cases of TB in San Francisco each year, and that in the U.S., there aren’t enough cases to merit vaccinations.

“You have these three people in the right conditions in a school where students are studying and learning for hours a day in close contact, they’re laughing, talking, singing, playing sports. It can be transferred even more easily than someone living in a household and don’t go out that many places.”

Public health officials plan to reassess test results every eight weeks until the outbreak is deemed over.

If you’re on the ABC7 News app, click here to watch live

San Francisco is preparing to host hundreds of thousands celebrating the Lunar New Year; Thursday, organizers shared their plans for this year’s Chinese New Year parade and festival.

Police shared some of their plans for security preparations for the March parade, at the same time businesses are certainly gearing up in hopes of getting in on the festivities, celebrations and traditions.

At Lion Trading in Chinatown, Lucas Li says the Lunar New Year celebration is an important time for the community and they’re preparing for it.

“I think the most popular thing people come for are our Chinese New Year envelopes, so I think as we welcome the year of the fire horse which is 2026 they are coming to look or these beautiful horse design envelopes,” Li said.

He’s hoping for success and looking forward to the weeks-long celebration starting in mid-February.

“The Lunar New Year I would say is the single largest economic driver for Chinatown every year, small business Chinatown, workers, restaurant look forward to the month long celebration,” said Donald Luu, president of the SF Chinese Chamber of Commerce. “We have a total of 60 floats approximately 70 units different organization, is going to be a huge event.”

The celebration starts in mid-February, with a parade set for March 7. The SFPD says it’s ready to ensure it will be a safe celebration for the tens of thousands who are expected to gather.

“You can expect that you will see a full complement of uniformed officers what we will expecting in terms of specialized units, plain clothes officers, motorcycles, the full gamut of officers to support festivities in this event,” said SFPD Chief Derrick Lew.

“This season is really important to small family-owned businesses like ours because we depend on the support of the community right and we want to promote these traditions for the younger generations,” Li said.

By Todd Gillespie and Catherine Lucey, Bloomberg

The US Department of Commerce is preparing to open a national artificial-intelligence center in San Francisco, putting it closer to firms at the center of some of the government’s most high-profile initiatives.

In addition to the Bay Area, AI export officials will be based in cities across the US, according to a Commerce official, who asked not to be identified.

The Trump administration is looking to increase the country’s edge in AI and defense, industries that are largely based in California. It also aims to exploit natural resources in the state to increase the nation’s energy independence and bolster its geopolitical leverage.