The combined counts of the S1, S2, and N antigens in the ELISPOT assay were associated with the number of symptoms First, we examined the combined spot counts of the S1, S2, and N antigens and the severity of COVID-19 in individual cases; however, a clear trend could not be established (Fig. 4 A).
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Cellular immunity reflects the persistent symptoms among COVID-19 recovered patients in Japan.
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