Overview Long COVID (also known as Post-Acute Sequelae of SARS-CoV-2 infection, or PASC) refers to a range of persistent symptoms that continue weeks or months after an initial COVID-19 infection. While symptoms vary widely, growing evidence suggests that nervous system dysregulation plays a central role in many cases. Rather than being a single-organ condition, Long COVID often reflects a systemic disruption —particularly involving the autonomic nervous system, immune signa

Chronic Fatigue Syndrome (CFS), also known as Myalgic Encephalomyelitis (ME), is a complex, long-term illness characterized by extreme...

What is MCAS? Mast Cell Activation Syndrome (MCAS) occurs when mast cells—immune cells that normally protect the body—become overactive....