America’s public health experts are working hard to map out a plan to combat the coronavirus in America. And there are indeed many proposals — from academic centers, from think tanks, and from the government. Sean Illing writes in Vox that while the plans differ, nearly all of them rely on some combination of surveillance, mass testing, isolation, and contact tracing. Many of them point to countries like Singapore, South Korea, and Germany as examples of how to intelligently respond to the pandemic. But what if the successful strategies in those countries just won’t work in America? This question was posed by Keith Humphreys, a Stanford University professor who works on addiction and public health policy, in a viral Twitter thread last week. Humphreys argued that a lot of his public health colleagues weren’t thinking seriously enough about the cultural obstacles that might undercut the country’s efforts to test, trace, and isolate Americans. He later penned a Washington Post column drawing out his arguments in a little more detail.