Why Covid-19’s Impact on Health Is a Long-Term Worry

The new coronavirus SARS-CoV-2 is as fast-spreading as it is enigmatic — with those afflicted experiencing everything from no symptoms to a scratchy throat to life-threatening pneumonia. While it seems that most infections lead to only mild cases of Covid-19, a significant portion of the tens of millions of people who have “recovered” suffer from lingering and sometimes debilitating heart, lung and nervous-system impairments. As researchers try to measure the durability and depth of what’s bein