Strange microscopic structures found in Long COVID blood

Scientists have discovered strange microscopic structures in the blood of people with Long COVID—clusters of tiny microclots tangled together with sticky immune webs known as neutrophil extracellular traps, or NETs. These combined structures show up far more often in Long COVID patients, where they appear larger, denser, and more stubborn than in healthy blood.

source https://www.sciencedaily.com/releases/2025/11/251112111021.htm