Recently, an asymptomatic patient in China with a normal chest CT scan was found to have spread COVID-19, the coronavirus at the center of the current headlines. Experts say this finding shows how difficult it will be to contain this outbreak.

With its potent mix of characteristics, [COVID-19] is unlike most that capture popular attention: It is deadly, but not too deadly. It makes people sick, but not in predictable, uniquely identifiable ways. Last week, 14 Americans tested positive on a cruise ship in Japan despite feeling fine—the new virus may be most dangerous because, it seems, it may sometimes cause no symptoms at all.

Read the full report in The Atlantic.