In this March 5, 2020, photo, a waitress of the Chinese restaurant Hot Pot serves customers in London. While white collar workers trying to avoid contagion can work from home or call in sick if they experience symptoms of the virus, such precautions are not an options for the millions of waiters, delivery workers, cashiers, ride-hailing drivers, museum attendants and countless others who routinely come into contact with the public. (AP Photo/Frank Augstein)
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