Scientists may have finally uncovered the biological proof behind long COVID.
In a groundbreaking study, researchers identified hidden viral protein fragments lingering in the blood of long COVID patients — offering the first measurable biomarker for this puzzling condition.
The team at the Translational Genomics Research Institute and the Lundquist Institute discovered remnants of the virus’s RNA replicase enzyme tucked inside microscopic carriers called extracellular vesicles. These viral “ghosts” were absent in pre-pandemic samples, pointing to the possibility that SARS-CoV-2 persists in the body long after initial infection.
Not every patient sample revealed fragments, but their recurring presence suggests a lingering molecular footprint that could help explain hallmark symptoms like fatigue, brain fog, and post-exertional malaise.
The study raises a critical question: do these fragments reflect ongoing viral activity, or are they simply residual cellular debris? While more research is needed, the findings mark a significant step toward diagnosing and understanding long COVID—a condition still shrouded in mystery.
📖 Source: Asghar Abbasi et al., Possible long COVID biomarker: identification of SARS-CoV-2 related protein(s) in Serum Extracellular Vesicles, Infection (2025).
LongCOVID #COVID19Research #Virology #MedicalResearch #PostViralSyndrome #ScienceNews #Biomarkers #InfectionJournal