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Granzyme ratio secretion according to disease severity. (A) Ga/Gb Ratio in HC, NH, and S COVID-19 patients; (B) Ga/Gb Ratio in NS and S COVID-19 patients; (C) Ga/Gb Ratio according to degranulation activity. HC, Healthy controls; NH, Non-hospitalized; NS, Non-severe; S, Severe. Low, CD107a expression Fold Change <9%; High, CD107a expression Fold Change >9%; *, p < 0.05; **, p < 0.01.
