The COVID – Mast Cell Activation Connection: Why Some People Never Fully Recover — section

In post-COVID mast cell activation syndrome (MCAS), these cells have been reprogrammed. They fire at things that aren’t threats. They fire too easily, too hard, and they don’t stop. The result is a constellation of symptoms that looks different in every person because mast cells are everywhere – and whatever tissue has the densest mast cell population in your body is where you’ll feel it most.