The Coronavirus's Xenophobia Problem

When news of a novel coronavirus began to trickle out of the Chinese city of Wuhan in early January, Eunice began wearing a face mask. Though she lives more than 7,000 miles away, in New York City, she reasoned it would nevertheless be an ideal way to protect herself, especially on public transport. A Hong Kong native who lived through the 2003 SARS outbreak, she understood wearing the mask to be more than a simple precaution.

“When you wear a mask, it’s a symbol of solidarity to other people,” Eunice,...