Northwestern Medicine is seeking 5,000 people who are at risk of exposure to the coronavirus and are interested in participating in vaccine studies to join its newly launched COVID Prevention Trials Registry.

Illinois and Chicago officials disagree on how to calculate the single most important benchmark for tracking the spread of the coronavirus, even as the number of confirmed cases of the virus continues to rise statewide.

Health experts think people who had COVID-19 will have some immunity against a repeat infection. But they don’t know how much protection or how long it would last.

The biggest test yet of an experimental COVID-19 vaccine got underway Monday with the first of some 30,000 Americans rolling up their sleeves to receive shots created by the U.S. government as part of the all-out global race to stop the pandemic.

As temperatures soar, you might be tempted to jump into Lake Michigan. But with Chicago beaches closed to prevent the spread of COVID-19, water safety advocates say there’s an increased risk of drowning. 

With Illinois reporting more than 1,000 new cases of COVID-19 for the sixth consecutive day, the state’s top public health official says the question of a reopening rollback will be answered by residents.

For nearly a week, more than 1,000 new cases of COVID-19 have been reported in Illinois each day. The spike has prompted Gov. J.B. Pritzker to repeatedly urge residents to wear masks and practice social distancing.

Sunday marks the fifth consecutive day in which the state saw an increase of more than 1,000 new cases. So far, more than 28,000 people in Illinois have been diagnosed with COVID-19 in July. 

McDonald’s says it will be requiring customers to wear face coverings when entering its U.S. restaurants as the number of new virus cases continue to surge in many states.

Three out of four Americans, including a majority of Republicans, favor requiring people to wear face coverings while outside their homes, a new poll finds.

Worn 24/7, the soft, flexible sensor is being used to monitor cough, shortness of breath and fever in a small number of patients and front-line health care workers. Researchers hope the device can provide more insight about the coronavirus.

The Cook County sheriff says an advocate for detainees is lying about what the jail has done to curb the coronavirus. She responds on “Chicago Tonight.”

State officials on Wednesday reported the highest single-day increase in COVID-19 cases for the month of July, prompting a stern warning from Illinois’ top doctor: Wear a mask or we’ll move backwards.

As workers return to offices, children prepare to return to schools and those desperate for normalcy again visit malls and restaurants, the emerging science points to a menacing reality: If people who appear healthy can transmit the illness, it may be impossible to contain.

It’s become one of the most pressing questions of the summer: Will schools reopen this fall, and if so, how will they do it safely? We speak with Chicago Public Schools CEO Janice Jackson.

Illinois has a plan in place to roll back restrictions if COVID-19 positivity rates spike. Now, one of the state’s 11 regions is “dangerously close to that threshold,” Gov. J.B. Pritzker said Tuesday.