Notably, 3 of the 7 S-RBD IgA positive patients in middle phase showed a decreasing trend afterwards.
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Mild Cytokine Elevation, Moderate CD4<sup>+</sup> T Cell Response and Abundant Antibody Production in Children with COVID-19.
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Notably, 3 of the 7 S-RBD IgA positive patients in middle phase showed a decreasing trend afterwards.