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Long COVID: Epstein-Barr virus may offer clues
Around a third of people who have had COVID-19 experience symptoms lasting 12 weeks or more, including fatigue, “brain fog,” and skin rashes, collectively known as long COVID.Other symptoms include difficulty sleeping, joint and muscle pain, sore throat, headaches, and fever.Individuals can develop long COVID regardless of whether their initial infection with SARS-CoV-2 — the virus that causes COVID-19 — was symptom-free, mild, or severe.Two small studies examined the role of the reactivation of another virus in long COVID and more severe cases of COVID-19. This other infection is EBV, a type of herpes virus that can cause glandular fever, which shares many symptoms with long COVID.