Enlarge / A long COVID patient sits with her daughter in her wheelchair while receiving a saline infusion at her Maryland home on Friday, May 27, 2022. Getty | The Washington Post
Tens of millions of people worldwide are thought to have developed long-term symptoms and conditions in the wake of a SARS-CoV-2 infection. But this sometimes-debilitating phenomenon, often called long COVID, remains a puzzle to researchers. What causes it? Who gets it? And, perhaps, the most maddening one: What is it?
Long COVID patients have reported a wide spectrum of more than 200 symptoms. Some are common, like loss
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