At a recent medical gathering, researchers presented their latest hypotheses about what causes – and what could treat – the lingering disease.
, although it isn't yet clear exactly how this is happening — and whether the virus itself is replicating., an infectious disease specialist at the University of California, San Francisco, told conference attendees that his team is now confident in their data showing pieces of viral antigen in the blood of people anywhere from six months to more than a year after they've had COVID-19.
But the story gets more messy from there because these viral reservoirs may not be the primary culprit. His lab has found activated T cells in the gut wall, lung tissue, certain lymph nodes, the bone marrow, the spinal cord and the brainstem, long after someone's initial infection.
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