In most countries in Europe and North America, governments have imposed lockdowns of their populations and economies. At first glance, this strategy would seem to strike a reasonable, if painful, bargain: pay the price of (hopefully temporary) limits on civil liberties and economic recession (if not depression) to slow virus spread. The price has been very high. In the U.S. alone, the bill has already reached trillions of dollars of lost economic activity and tens of millions out of work. The material pain may go beyond economic insecurity. Many Americans face the real prospect of food shortages. Sweden, however, has...