Mayor Lori Lightfoot tests positive for COVID-19, she says in tweet

CHICAGO (WLS) -- Mayor Lori Lightfoot has tested positive for COVID-19, she said in a tweet.

"Earlier today, I tested positive for COVID-19," the mayor tweeted. "I am experiencing cold-like symptoms but otherwise feel fine which I credit to being vaccinated and boosted. I will continue to work from home while following the CDC guidelines for isolation."

The mayor's last public appearance was at a press conference Monday night announcing the end of the standoff between Chicago Public Schools and the Chicago Teachers Union over remote learning and COVID safety metrics. She was in close proximity with CPS CEO Pedro Martinez.

Lightfoot was also in close proximity to Chicago Department of Public Health Commissioner Dr. Allison Arwady during the CTU and CPS standoff. CDPH released a statement Tuesday, saying, "Dr. Arwady feels fine and she continues to take precautions such as masking and social distancing. But as she's fully vaccinated and boosted, she does not need to quarantine after a possible close contact exposure. She will continue to monitor for any symptoms and follow the public health guidance. The COVID-19 vaccines provide great protection against severe outcomes, and she's hopeful people will use this news to get vaccinated and boosted."

Before Monday's news conference, Lightfoot also spoke at a South Side memorial service for well-known funeral director Lafayette Gatling.

Lightfoot received her booster shot on Nov. 12, during a citywide "vaccination awareness day" before the emergence of the highly contagious omicron variant.

Illinois reported 28,110 new COVID-19 cases Tuesday and 92 related deaths. The statewide positivity rate is 16.9%.

RELATED: Illinois reports 28,110 new cases, 92 deaths

Chicago COVID cases have been surging for two straight weeks.

"I'm less concerned than I was even three or four days ago about where we are but I'm still concerned about the hospitals," said Arwady. "This hopeful flattening that we are seeing right now, I've got to see it for at least a week to really trust it."

"This is still a very bad surge, and I don't want people to think otherwise. And I really don't want people to think sort of it's over; it is extremely not over," Arwady added.

Health officials in the city and state have stressed the importance of getting vaccinated and boosted in order to fight COVID and omicron. Health officials have noted that the vast majority of severe cases, hospitalizations and deaths have been in unvaccinated patients.

"We continue to see the COVID-19 vaccine provide great protection against serious outcomes - specifically hospitalization and death," said CDPH Commissioner Allison Arwady, M.D. "Especially in the colder months and through the current Omicron surge, it is so important that all eligible members of your family have received their COVID-19 vaccine and booster."

RELATD: Chicago to distribute 1.5M KN95 face masks across city

The Chicago Office of Emergency Management and the Chicago Department of Public Health worked to distribute 1.5 million KN95 masks across the city Tuesday, available at aldermanic offices for constituents and community groups.

The wave of omicron variant infections in the city, state and country has intensified steadily through the winter.