In this March 26, 2021, file photo a member of the Philadelphia Fire Department prepares a dose of the Johnson & Johnson COVID-19 vaccine at a vaccination site setup in Philadelphia. (AP Photo / Matt Rourke, File)

U.S. regulators on Monday added a new warning to Johnson & Johnson’s COVID-19 vaccine about links to a rare and potentially dangerous neurological reaction, but said it’s not entirely clear the shot caused the problem.

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For the first time in nearly a year, visitors to Chicago from anywhere within the United States do not have to quarantine for 10 days or record a negative test for COVID-19, city officials announced Tuesday.

Dr. Susan Bleasdale appears on “Chicago Tonight” via Zoom on Tuesday, Feb. 16, 2021. (WTTW News)

Bars and restaurants in Chicago can now expand their capacity for indoor service. We discuss that and other COVID-19 developments with Dr. Susan Bleasdale, medical director of infection prevention and control at University of Illinois Health.

This 2020 electron microscope image provided by the National Institute of Allergy and Infectious Diseases - Rocky Mountain Laboratories shows SARS-CoV-2 virus particles which cause COVID-19, isolated from a patient in the U.S., emerging from the surface of cells cultured in a lab. (NIAID-RML via AP)

The mutated version of the virus, first identified in South Africa, was found in two cases in South Carolina. Public health officials said it’s almost certain that there are more infections that have not been identified yet. 

In this Nov. 19, 2020, file photo, medical personnel prone a COVID-19 patient at Providence Holy Cross Medical Center in the Mission Hills section of Los Angeles. (AP Photo / Jae C. Hong, File)

The U.S. recorded over 3,100 COVID-19 deaths in a single day, obliterating the record set last spring, while the number of Americans in the hospital with the virus has eclipsed 100,000 for the first time, according to figures released Thursday.

(WTTW News via CNN)

What you need to know about the race for a coronavirus vaccine.

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The spread of COVID-19 has sparked fear and apprehension — and misinformation can elevate those emotions. To help answer your questions about the new coronavirus, we turned to infectious disease specialist Dr. Susan Bleasdale of UI Health.

(WTTW News)

Restaurants have closed for dine-in business. Schools are shuttered. Gatherings should be limited. How big a difference will these rules make? We speak with an infectious disease doctor about the new recommendations.

This illustration provided by the Centers for Disease Control and Prevention in January 2020 shows the 2019 Novel Coronavirus (2019-nCoV).

State and local health officials reported the first cases of the novel coronavirus outside of Cook County as they announced eight more people have tested positive for the virus.