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Comparison of anti-SARS-CoV-2 IgG antibody titers against S1 protein and interferon-gamma concentrations released after stimulation of Th lymphocytes in 28 individuals (patients who recovered from SARS. vaccinated persons without previous viral infection. and vaccinated SARS-recovered). The red frame marks 3 people who were infected with the SARS-CoV-2 virus despite vaccination.
