CD8A and COVID-19: We have also provided evidence of CD8 + T cell cross‐reactivity, not only to an extent that indicates that naïve individuals could mount cross‐reactive responses to SARS‐CoV‐2 and common‐cold coronaviruses, but we also found that SARS‐CoV‐2 infection induces CD8 + T cell responses against peptides with high similarity to HCoV in some COVID‐19 patients.