Another peer reviewed paper on T-cell immunity.
Quote:
Professor Danny Altmann, British Society for Immunology spokesperson and Professor of Immunology at Imperial College London, said, “Among the many studies of cellular (T cell) immunity to SARS-CoV-2 that have appeared in the past few months, this is one of the most robust, impressive and thorough in the approaches used. It adds to the growing body of evidence that many people who were antibody-negative actually have a specific immune response as measured in T-cell assays, confirming that antibody testing alone under-estimates immunity.”
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Link
Still needs more research though.