https://www.selleckchem.com/pr....oducts/ldc195943-imt
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and vaccination elicit CD4+ T cell responses to the spike protein, including circulating follicular helper T (cTFH) cells that correlate with neutralizing antibodies. Using a novel HLA-DRB1*1501/S751 tetramer to track spike-specific CD4+ T cells, we show that primary infection or vaccination induces robust S751-specific CXCR5- and cTFH cell memory responses. Secondary exposure induced recall of CD4+ T cells with a transitory CXCR3+ phenotype, and drove expansi
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