Can you contract COVID-19 multiple times? What is herd immunity, and will we get to the point where we have it before a vaccine is released? What happens if we open everything up too quickly?  How long will we have to practice social distancing? A month? A year? Longer than that? Dr. Helen Koenig, Associate Professor of Clinical Medicine and an infectious disease expert at Penn Medicine joins KYW In Depth to answer these questions and more, breaking down what we understand about COVID-19, and what we still need to learn. See omnystudio.com/policies/listener for privacy information.

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