COVID-19(17) SARS-CoV-2(16) Activation(6) IFN-γ(6) Genes(6) COVID-19 patient(6) receptor(6) response(5) Patient(5) CD8(5) naïve(5) Cytokine storm(4) Vaccine(4) spike(3) severity(3) dysregulation(3) coronavirus disease(3) NK cells(3) T cell(3) COVID-19 infection(3) severe lung inflammation(3) CD25(3) homeostasis(3) SARS-CoV-2 peptide(3) cytotoxic T lymphocytes(3) regulate(3) heterogeneous(3) syndrome(3) in silico analysis(3) helper(3)