Maryland Gov. Larry Hogan has tested positive for COVID-19. He announced the diagnosis on social media on Monday morning.

“This morning, as part of my regular testing routine, I received a positive rapid test for COVID-19. I have been vaccinated and boosted, and I am feeling fine at the moment,” Hogan tweeted.

“As the omicron variant becomes dominant, I want to urge you to get vaccinated or get your booster shot as soon as possible,” Hogan wrote, linking to the state’s vaccination website.

Later in the day, a more accurate PCR test confirmed the positive results of the rapid test, Hogan said in a statement Monday evening. He reported “cold-like symptoms,” and said he planned to quarantine and work from home “throughout the week.”

COVID cases are spiking in the D.C. region, possibly fueled by the rapidly spreading omicron variant, which was first reported in Maryland on Dec. 3. However, information on the outbreak in Maryland has been extremely limited: The state health department did not reported new case numbers for more than two weeks, following a cyberattack on Dec. 4. The data portal was mostly restored on Monday.

The state has continued to report hospital bed use, and statistics show a dramatic increase in recent weeks. Hospitalizations have doubled since the beginning of December, to 1,345. That’s still below the pandemic peak of 1,952 hospital beds in use on Jan. 11, 2021, at the height of last winter’s infection surge.

“We’re pretty concerned about this omicron variant,” Hogan said, speaking on Fox News Sunday on Dec. 19, the day before testing positive. “We are anticipating in the next 3-5 weeks probably the worst surge we’ve seen in our hospitals throughout the entire crisis.”

On Monday afternoon, new data from the Centers for Disease Control and Prevention showed omicron to be the dominant variant in the U.S., nationally accounting for 73.2% of new infections last week. In the mid-Atlantic region, omicron accounted for 75.8% of new infections.

Despite rising case numbers, Hogan dismissed the idea of any new restrictions on activities to curb the spread of the virus. (D.C. Mayor Muriel Bowser would go on to reinstate the District’s mask mandate, among other restrictions, on Monday.)

“We’re encouraging boosters, but we’re not anticipating any lockdowns at all. We’re not considering that,” Hogan said.

Hogan also criticized Prince George’s County Public Schools, which announced last week that all students will return to virtual learning until mid-January. “It’s a big deal and a terrible mistake and something we’re very opposed to,” Hogan said.

On Sunday, Maryland reported surpassing 10 million vaccine doses administered; more than 90% of adult residents have received at least one dose. However only 1.4 million of the state’s 6.1 million residents have gotten boosters. An early study of omicron has shown that 2 doses of the Pfizer vaccine provide just 33% protection against infection by the new variant. However, 2 doses provide 70% protection against hospitalization, according to the study. Both Moderna and Pfizer have said their booster shots provide significant protection against omicron.

Hogan is the second local politician to contract COVID-19 in recent days, following a Friday announcement from D.C.’s Ward 8 Councilmember Trayon White that he’d tested positive.

This story was updated to add new information about Hogan’s PCR test results, the spread of omicron, and Maryland’s COVID dashboard.