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(WTTW News)

More than 35.6% of the Chicago Police department — 4,543 employees — are in jeopardy of being disciplined and eventually fired for failing to disclose their vaccination status to the city. 

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In this May 12, 2021, file photo, Environmental Protection Agency administrator Michael Regan speaks during a press briefing at the White House in Washington. (AP Photo/Evan Vucci, File)

Michael Regan, the head of the Environmental Protection Agency, said his agency is taking a series of actions to limit pollution from a cluster of long-lasting chemicals known as PFAS that are increasingly turning up in public drinking water systems, private wells and even food.

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(Holger Schue / Pixabay)

Despite the watchdog's findings, Chicago officials insisted that ComEd was responsible for the outages.

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In Latino communities, rates of initial vaccination are still lagging with just 52% of Latinos in Chicago having completed their vaccine series according to the city’s public data portal. (WTTW News)

An advisory panel with the Food and Drug Administration is recommending that the agency authorize COVID-19 booster shots for Moderna and Johnson & Johnson. However, in Latino communities, rates of initial vaccination are still lagging.

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John Catanzara (WTTW News)

A Cook County judge ordered Police Union President John Catanzara on Friday to stop making public statements on social media or in the media that encourage police officers not to comply with the city’s COVID-19 vaccine mandate until a hearing Oct. 25.

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(Ana Krach / Pixabay)

With Halloween and Día de los Muertos fast approaching, state health officials released guidelines Friday to help people safely celebrate common fall traditions, like trick-or-treating and visits to pumpkin patches.

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In this March 3, 2021 file photo, a vial of the Johnson & Johnson COVID-19 vaccine is displayed at South Shore University Hospital in Bay Shore, N.Y. (AP Photo / Mark Lennihan, File)

U.S. health advisers endorsed a booster of Johnson & Johnson’s COVID-19 vaccine Friday, citing growing worry that Americans who got the single-dose shot aren’t as protected as those given two-dose brands.

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Mayor Lori Lightfoot addresses the news media Friday Oct. 15, 2021. (Chicago's Mayor's Office)

Police and other first responders — who come in close physical contact with Chicagoans — must be vaccinated to protect the health and safety of Chicagoans, Mayor Lori Lightfoot said. 

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Fraternal Order of Police Lodge 7 President John Catanzara appears on “Chicago Tonight” via Zoom on Thursday, May 14, 2020. (WTTW News)

Fraternal Order of Police President John Catanzara's actions and rhetoric "threatens the health and safety of Chicago’s residents and first responders," Mayor Lori Lightfoot said.

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Community gardening in North Lawndale (Courtesy Young Mens Educational Network Chicago)

Located on Chicago’s West Side, North Lawndale is a neighborhood that has dealt with decades of disinvestment and vacant spaces. Community members have taken things into their own hands by creating community gardens and safe spaces for the next generation.

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This Wednesday, Dec. 23, 2020 file photo shows a vial of the Moderna COVID-19 vaccine in the first round of staff vaccinations at a hospital in Denver. (AP Photo / David Zalubowski, File)

The panel of outside advisers to the Food and Drug Administration voted unanimously to recommend a booster shot for seniors, as well as younger adults with other health problems, jobs or living situations that put them at increased risk from COVID-19.

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Pharmaceutical company Merck & Co. said Friday, Oct. 1, 2021, that its experimental COVID-19 pill reduced hospitalizations and deaths by half in people recently infected with the coronavirus and that it would soon ask health officials in the U.S. and around the world to authorize its use. (Merck & Co. via AP)

The Food and Drug Administration said Thursday it will ask its outside experts to meet in late November to scrutinize Merck’s pill to treat COVID-19.

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(WTTW News)

A University of Illinois Chicago lab and its partners have been tracking the virus that causes coronavirus in wastewater and sharing the data with local public health agencies. 

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In this Aug. 10, 2021, file photo, Fraternal Order of Police Lodge 7 President John Catanzara speaks to reporters at the Leighton Criminal Courthouse in Chicago. (Ashlee Rezin / Chicago Sun-Times via AP, File)

In a video posted online Tuesday, Fraternal Order of Police President John Catanzara vowed to take Mayor Lori Lightfoot’s administration to court if it tries to enforce a mandate, which requires city workers to report their vaccine status by the end of the work week. 

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(WTTW News)

Chicago Public Schools CEO Pedro Martinez said those staffers who are not fully vaccinated by Friday’s deadline must consent to weekly testing, but will not be immediately barred from working, as had previously been threatened.

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In this Wednesday, March 3, 2021 file photo, a pharmacist holds a vial of the Johnson & Johnson COVID-19 vaccine at a hospital in Bay Shore, N.Y. (AP Photo / Mark Lennihan)

The Food and Drug Administration is wrestling with whether and when to offer another dose of the single-shot Johnson & Johnson COVID-19 vaccine, while a new study out Wednesday raises the prospect that using a different brand as the booster might work better.