Inside 'post-Covid' clinics: How specialized centers are trying to treat long-haulers

As the coronavirus pandemic in the U.S. appears to be turning a corner, another health crisis is brewing: Covid-19 survivors struggling to bounce back to their former selves.

Of the more than 28 million Americans diagnosed with Covid-19, an estimated 10 to 30 percent — possibly as many as 8.4 million people — fall into the category commonly known as "long-haulers."

Despite the staggering numbers, there's no clear diagnosis, no standard care and no national guidelines for how these patients should be treated. There are hopeful signs, however. At special...