Global health organizations are racing to stem an Ebola outbreak in central Africa. While the immediate threat is still far away from Chicago, local specialists are working to ensure the city is prepared for all possibilities.

Budding plants and blooming trees signal the return of spring, triggering congestion, coughing and sneezing for the millions of seasonal allergy sufferers. With COVID-19 still circulating, how can you tell if your stuffy nose is just a case of hay fever and not something more? Here’s what you need to know.

Who should be wearing masks? Is the virus seasonal? A local infectious disease physician answers these questions and others about COVID-19.