South Korea detected its first case of COVID-19 one day before the US, but rather than initiate lockdowns, it launched a program that shares location information on COVID-19 patients. Chang-Tai Hsieh discusses how South Korea limited COVID-19 deaths to 5.2 per million while the US rate climbed to 289 per million, and what it may reveal about the cost of privacy.

Does visiting a bookstore put you at greater risk for infection than a fast-food restaurant? As states loosen lockdown restrictions on businesses, Katherine Baicker and Oeindrila Dube have developed a measure of which businesses pose the greatest risk for spreading disease based on factors like crowding, length of stay, and potential for touch contact.