In a small study of 32 adults suffering from COVID brain fog, researchers found that brain fluid had elevated levels of proteins, suggesting swelling in the cranium.
Doctor Joanna Hellmuth, who is the lead researcher in the study said that they believe COVID-19 may have triggered an unusual immune system response among the people they're studying.
"I’m seeing otherwise healthy people who got covid who are getting persistent cognitive changes afterwards,” said Hellmuth. “I'm seeing teenagers, I’m seeing people in their 20's, their 30's, their 40's, I’m seeing 80-year-olds."
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