April, wrote a poet, is the cruelest month. So it was in New York City and America as we weathered a viral storm and its concomitant carnage. As the calendar turns to May, some cruelty appears to be abating. But death could rush back with a vengeance if the nation, understandably eager to nurse its economic wounds, forgets lessons just agonizingly absorbed.A month ago, 4,780 Americans had lost their lives to COVID-19. Today, we’ll top 63,000 fatalities. The coronavirus has fallen far past its peak here in its epicenter, but nationwide, over the last five days, U.S. deaths averaged around 2,000…