With several Chicago-area counties under a "high" community level for COVID and more residents testing positive for the virus or being exposed to someone who has, many are wondering how long they ...

If you test positive for coronavirus or are exposed to someone who has, just how long should you quarantine or isolate? Here's what the experts say. First, you'll need to know the difference between ...

Enormous databases do not necessarily allow scientists to solve long COVID mysteries, such as how well vaccination protects against the condition. Clinical epidemiologist Ziyad Al-Aly has access to a ...

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Obesity is a qualifying condition for an early COVID-19 vaccine in at least 18 states. The threshold for obesity is determined by body mass index (BMI) - anyone with a BMI over 30. Using a simple ...