Mayor Brandon Johnson picked Dr. Olusimbo “Simbo” Ige to lead the Chicago Department of Public Health. (Credit: City of Chicago)
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Dr. Olusimbo “Simbo” Ige will now be asked to deliver on Mayor Brandon Johnson’s vision of public health for Chicago — while coping with the continuing pandemic.

Dr. Allison Arwady appears on "Chicago Tonight" on Oct. 18, 2022. (WTTW News)
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During his campaign for mayor, Brandon Johnson promised to fire Chicago Department of Public Health Commissioner Dr. Allison Arwady, and Friday night, he did just that — setting off a wave of recriminations and outrage.

Dr. Allison Arwady appears on "Chicago Tonight" on March 20, 2023. (WTTW News)
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Dr. Allison Arwady was the public face of Chicago’s response throughout the COVID-19 pandemic. At the height of the pandemic, she hosted online question-and-answer sessions twice a week and frequently briefed the news media.

This electron microscope image shows mature, oval-shaped mpox virions, left, and spherical immature virions, right, from a human skin sample associated with a 2003 prairie dog outbreak. (Cynthia S. Goldsmith, Russell Regnery / CDC)

Officials with the Chicago Department of Public Health have documented 29 cases of the virus that can cause intensely painful lesions between April 22 and Tuesday, after recording just five cases between Jan. 1 and April 15, according to city data.

(WTTW News)

Recently, a young child was poisoned in his Belmont-Cragin apartment and now faces a host of health problems. It’s spurred a debate on whether the city can do more to fix the problem before another child is affected. 

Dr. Allison Arwady, commissioner of the Chicago Department of Public Health, appears on "Chicago Tonight" on March 20, 2023. (WTTW News)

Throughout the pandemic, Dr. Allison Arwady, commissioner of the Chicago Department of Public Health, led Chicago’s effort to fight the deadly virus. On this third anniversary of the pandemic, Arwady reflects on lessons learned and whether she would have done anything differently. 

(Patty Wetli / WTTW News)

During the past seven days, an average of 31 people have been hospitalized each day in Chicago from COVID-19, down more than 40% during the past week, according to city data last updated Wednesday.

(Patty Wetli / WTTW News)

Mayor Lori Lightfoot on Thursday said the city is expected to move from a “medium” risk level for contracting COVID-19 back to a “high” risk level, likely sometime in the next week. When that happens, the city will reinstate an advisory, urging Chicagoans to mask up.

(Patty Wetli / WTTW News)

Chicago hospitals and health care providers are also coping with sharp increases in flu cases and illness caused by RSV, a respiratory virus, officials said.

(Patty Wetli / WTTW News)

The move is likely to reduce fears, at least temporarily, of an imminent surge of COVID-19 once colder weather settled over Chicago for the duration, forcing people indoors.

(Patty Wetli / WTTW News)

Chicago and Cook County last faced a medium risk of COVID-19 in mid-September.

This electron microscope image shows mature, oval-shaped monkeypox virions, left, and spherical immature virions, right, from a human skin sample associated with a 2003 prairie dog outbreak. (Cynthia S. Goldsmith, Russell Regnery / CDC)

The two people — about whom no other information was shared — both had underlying health conditions, including weakened immune systems, and were diagnosed with the virus more than six weeks ago, officials said.

Dr. Allison Arwady appears on "Chicago Tonight" on Oct. 18, 2022. (WTTW News)

Chicago Department of Public Health Commissioner Dr. Allison Arwady said COVID hospitalizations remain a point of some concern in the city.

(Patty Wetli / WTTW News)

Chicago and Cook County last faced a low risk of COVID-19 on May 5. The region has bounced between a medium risk and a high risk all summer.

(WTTW News)

Chicago Department of Public Health Commissioner Dr. Allison Arwady urged all Chicagoans older than 12 who were vaccinated against COVID-19 with the original vaccine at least two months ago to get the updated vaccine, which targets the BA.4 and BA.5 subvariants of the omicron variant of COVID-19. 

(WTTW News)

Dr. Allison Arwady, commissioner of the Chicago Department of Public Health, called the vaccines the “best possible match” against strains of the virus now in circulation. They’ve been formulated to provide immunity against the omicron variants BA.4 and BA.5, which account for nearly all of the cases of COVID-19 in the U.S.