Millions of Americans were exposed to SARS-CoV-2, the virus that causes COVID-19, early in the pandemic but could not get diagnosed due to testing limitations. Many of those people developed a post-viral syndrome with symptoms similar to those of long COVID. In a new study of a small group of those people, their immune response shows that 41% had evidence of SARS-CoV-2 exposure. The study is published in Neurology Neuroimmunology & Neuroinflammation.
Millions of Americans were exposed to SARS-CoV-2, the virus that causes COVID-19, early in the pandemic but could not get diagnosed due to testing limitations. Many of those people developed a post-viral syndrome with symptoms similar to those of long COVID. In a new study of a small group of those people, their immune response shows that 41% had evidence of SARS-CoV-2 exposure.
The small study involved 29 people with post-viral syndrome including neurologic symptoms such as problems with memory and thinking skills, headache and fatigue but who did not have a positive COVID test result. They were matched with 32 people of similar age with long COVID and positive test results. Both groups were also compared to 18 people with none of those symptoms and no known exposure to COVID or positive test result.
That group also had similar symptoms to the long COVID group and similar results on tests of thinking skills.
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