Hundreds of thousands of Americans have sought medical care for post-Covid health problems that they had not been diagnosed with before becoming infected with the coronavirus, according to the largest study to date of long-term symptoms in Covid-19 patients.
The study, tracking the health insurance records of nearly two million people in the United States who contracted the coronavirus last year, found that one month or more after their infection, almost one-quarter — 23 percent — of them sought medical treatment for new conditions.