Long Covid is a chronic illness resulting from a Covid-19 infection. It goes by many names, including long-haul Covid, post-Covid or post-acute Covid syndrome.
Not much is yet known about the illness. Its symptoms number in the
hundreds and can be debilitating. They can also be challenging to diagnose — for doctors even willing to do so.
Long Covid has affected as many as 23 million Americans. It may cost the U.S. economy $3.7 trillion, roughly that of the Great Recession, according to one estimate.
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Cause: Doctors don’t yet know what causes long Covid. They have (d21: baffled?) theories: Perhaps it’s an autoimmune disorder, like lupus or rheumatoid arthritis, whereby the virus is gone but the immune system remains active, attacking healthy cells by mistake; or maybe small blood clots develop in the brain, too small to cause a stroke but big enough to trigger neurologic issues.
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