IL17A and COVID-19: Finally, the SARS-CoV-2-related peptides (Pool Spike CoV-2 and/or Pool CoV-2) induced changes in the expression of IL-10 and PD-1 in volunteers who recovered from mild COVID-19, IL-17 in volunteers who recovered from Severe COVID-19, and LAP and co-expression of cytotoxic granules in HC.