The Covid-19 pandemic has spurred a remarkable stream of scientific investigation, but that knowledge isn’t translating into better public policy. One example is a zealous pursuit of public mask wearing, a measure that has had, at best, a modest effect on viral transmission. Or take lockdowns, shown by research to increase deaths overall but nonetheless still considered an acceptable solution. This intellectual disconnect now extends to Covid-19 vaccine mandates. The policy is promoted as essential for stopping the spread of Covid-19, though the evidence suggests it won’t.