[WATCH] Columbia University Infectious Disease Expert on How to Safely Ride the Subway

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Dr. Wafaa El-Sadr, professor of epidemiology and medicine as well as ICAP director at Columbia University, shows how to ride the New York City subway safely during the coronavirus pandemic. El-Sadr also explains what the Metropolitan Transportation Authority (MTA) is doing behind the scenes to keep the subway clean and help prevent the spread of disease.