The true cost of the Covid-19 pandemic is nearly impossible to quantify. The human toll, surpassing the Vietnam War last week at 60,000 deaths, is difficult to comprehend. The number of people who have lost their livelihoods, at 30 million, is as yet incomplete, as many face long waits to file for unemployment. And we still don’t know the long-term effects on the economy or how the crisis will end, as experts warn that the novel coronavirus may well return in the fall.