New research from UC San Francisco has found that COVID-19 can remain in the blood and tissue of some patients for over a year after infection, offering insights into the development of long COVID symptoms. The studies led by Michael Peluso reveal COVID antigens persisting in the blood for up to 14 months and in tissue samples for over two years, suggesting a possible link to long-term health effects.
The findings were presented at the Conference on Retroviruses and Opportunistic Infections , which was held March 3 to 6, 2024, in Denver.Early in the pandemic, COVID-19 was thought to be a transient illness. But a growing number of patients, even those who had previously been healthy, continued having symptoms, such as, brain fog, digestive problems, and vascular issues, for months or even years.
Among those who were hospitalized for COVID, the likelihood of detecting the COVID antigens was about twice as high as it was for those who were not. It was also higher for those who reported being sicker, but were not hospitalized. Peluso said more research is needed to determine whether the persistence of these fragments drives long COVID and such associated risks as heart attack and stroke.
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