A Cook County man in his 80s who became ill in mid-June is the first person known to have contracted the West Nile virus in Illinois this year, according to state health officials.

New York on Tuesday became the nation’s first big city to announce it will require proof of COVID-19 vaccination at restaurants, shows and gyms.

Cook County residents, including Chicagoans, can now get a free ride to a nearby vaccination site, thanks to the new “Destination: Vaccination” program.

Many unknowns about COVID-19 remain more than a year into the pandemic, among them the mysterious loss of taste and smell. But new research offers insight into the cause of this common symptom.

One of the leading doctors for the U.S. Olympic team says star gymnast Simone Biles was right to withdraw from competition after a bout of what gymnasts call the “twisties.” Dr. Mark Hutchinson joins us from Tokyo to share his impressions of the Games so far.

People with HIV can no longer be criminally prosecuted for exposing someone else to the virus without their knowledge. Advocates say the law discouraged testing and treatment for HIV — and the repeal is long overdue.

The U.S. on Monday finally reached President Joe Biden’s goal of getting at least one COVID-19 shot in the arms of 70% of American adults — a month late and amid a fierce surge by the delta variant.

Playing sports. Hugging family and friends. Going to school or the doctor's office. What’s the risk of COVID-19 exposure for each of these activities among children who aren’t yet eligible for the vaccine? More than 100 physicians weigh in as part of a new survey.

Anger and frustration mounted in Congress over the weekend as a nationwide eviction moratorium expired during a surge in the COVID-19 pandemic. One Democratic lawmaker even camped outside the Capitol in protest as millions of Americans faced being forced from their homes.

The nation’s top infectious disease expert warned Sunday that more “pain and suffering” is on the horizon as COVID-19 cases climb again and officials plead with unvaccinated Americans to get their shots.

The latest guidance from the U.S. Centers for Disease Control and Prevention says people who are fully vaccinated should get tested three to five days after a potential exposure, even if they don’t have symptoms.

President Joe Biden has announced sweeping new pandemic requirements aimed at boosting vaccination rates for millions of federal workers and contractors as he lamented the “American tragedy” of rising-yet-preventable deaths among the unvaccinated.

New evidence showing the delta variant is as contagious as chickenpox and may be more dangerous than other versions has prompted U.S. health officials to consider changing advice on how the nation fights the coronavirus, internal documents show.

Everyone in Chicago, regardless of their vaccination status should wear a mask indoors, Chicago health officials recommended Friday after the Centers for Disease Control and Prevention added Chicago to its list of areas experiencing “substantial” transmission of the coronavirus.

Can you still get COVID-19 after you’ve been fully vaccinated? Does the vaccine affect fertility? And does the vaccine alter DNA? Dr. John Segreti, hospital epidemiologist and medical director of infection control and prevention at Rush University Medical Center, weighs in.

As thousands of music lovers flocked to Grant Park for the first day of Lollapalooza, a surge of confirmed cases of COVID-19 in Chicago and the suburbs prompted Gov. J.B. Pritzker to reimpose a mask mandate in state facilities for everyone, regardless of their vaccination status.