We've learned an awful lot about Covid-19 since the virus first hit us—but there are some things that we're still trying to solve. One of them, perhaps the most mysterious, is the phenomenon known as 'long covid'. We know much more about it now than we did in 2020, when some of those infected with the virus reported lingering symptoms, often debilitating ones.

But there is still so much to learn—everything from who's most vulnerable to it, how to protect yourself, how to effectively treat it and if we'll ever find a cure. As the pandemic has eased, fewer resources have been allocated to this disease—but there are researchers still trying to crack this case, and we'll talk to one of them.

GUEST: Dr. Ziyad Al-Aly, clinical epidemiologist at Washington University in St. Louis; chief of research and development at the VA St. Louis Health Care System

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