We found highly significant differences in numbers of C3 + ( Fig. 1d , upper right), SARS-CoV-2 + ( Fig. 1d , lower left), and C3/SARS-CoV-2 double-positive ( Fig. 1d , lower right) cells between SARS-CoV-2-infected cultures and uninfected and ColdZyme-treated/SARS-CoV-2-infected, primary respiratory cultures.
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