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Long COVID
In the second small study, researchers at universities in the United States and Turkey found that around a third of 185 randomly surveyed COVID-19 patients had symptoms at least 30 days after testing positive.
When the scientists tested blood samples from some participants, they discovered that 66.7% (20 out of 30) of those with long COVID had a reactivated EBV infection.
By contrast, only 10% (2 out of 20) of those who did not develop long COVID were positive for EBV reactivation.