Long COVID leaves distinctive signs in the blood which could potentially be targeted for treatment, research suggests. The analysis of more than 650 people who had been in hospital with severe COVID-19 found patients with prolonged symptoms showed evidence of their immune system being activated. How the activation happened depended on the type of symptoms they mainly had, for example fatigue or brain fog.
' Click to subscribe to the Sky News Daily wherever you get your podcasts The study, published in the journal Nature Immunology, compared 426 people who were experiencing symptoms with long COVID - having been admitted to hospital with COVID-19 at least six months prior to the study - with 233 people who were admitted to hospital for COVID-19 but who had fully recovered.
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