Epidemiology is a science of possibilities and persuasion, not of certainties or hard proof. “Being approximately right most of the time is better than being precisely right occasionally,” the Scottish epidemiologist John Cowden wrote, in 2010. “You can only be sure when to act in retrospect.” Epidemiologists must persuade people to upend their lives—to forgo travel and socializing, to submit themselves to blood draws and immunization shots—even when there’s scant evidence that they’re directly at risk. [...]
The lead spokesperson should be a scientist. Dr. Richard Besser, a former acting C.D.C. director and an E.I.S. alumnus, explained to me, “If you have a politician on the stage, there’s a very real risk that half the nation is going to do the opposite of what they say.” During the H1N1 outbreak of 2009—which caused some twelve thousand American deaths, infections in every state, and seven hundred school closings—Besser and his successor at the C.D.C., Dr. Tom Frieden, gave more than a hundred press briefings. President Barack Obama spoke publicly about the outbreak only a few times, and generally limited himself to telling people to heed scientific experts and promising not to let politics distort the government’s response. “The Bush Administration did a good job of creating the infrastructure so that we can respond,” Obama said at the start of the pandemic, and then echoed the sohco by urging families, “Wash your hands when you shake hands. Cover your mouth when you cough. I know it sounds trivial, but it makes a huge difference.”At no time did Obama recommend particular medical treatments, nor did he forecast specifics about when the pandemic would end. [...]
Public-health officials say that American culture poses special challenges. Our freedoms to assemble, to speak our minds, to ignore good advice, and to second-guess authority can facilitate the spread of a virus. “We’re not China—we can’t order people to stay inside,” Besser said. “Democracy is a great thing, but it means, for something like covid-19, we have to persuade people to coöperate if we want to save their lives.” [...]
Today, New York City has the same social-distancing policies and business-closure rules as Seattle. But because New York’s recommendations came later than Seattle’s—and because communication was less consistent—it took longer to influence how people behaved. According to data collected by Google from cell phones, nearly a quarter of Seattleites were avoiding their workplaces by March 6th. In New York City, another week passed until an equivalent percentage did the same. Tom Frieden, the former C.D.C. director, has estimated that, if New York had started implementing stay-at-home orders ten days earlier than it did, it might have reduced covid-19 deaths by fifty to eighty per cent. Another former New York City health commissioner told me that “de Blasio was just horrible,” adding, “Maybe it was unintentional, maybe it was his arrogance. But, if you tell people to stay home and then you go to the gym, you can’t really be surprised when people keep going outside.”
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