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A study investigating post-acute sequelae of COVID-19 (PASC) utilized advanced magnetic resonance spectroscopy (MRS) neuro-imaging to directly measure brain chemistry in Long COVID patients suffering from cognitive dysfunction
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The answer is not simple
And the numbers reflect just how widespread the issue has become
Classically, nave CD4 T cells differentiate upon activation into T helper cell subsets including Th1, Th2, Th17, T follicular helper, and regulatory T cells, often based on cytokine signals delivered by the surrounding milieu (121)
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