ALT: a skeleton is standing on its hind legs in a living room .

ALT: a close up of a hamster with its mouth open and its eyes closed .

ALT: the grinch is a cartoon character with a very angry face and a blue background .

Researchers employed a specialized brain imaging technique to identify a potential biomarker and therapeutic target for Long COVID. More than four years after the onset of the COVID-19 pandemic, scien...