DNPH1 and infection: Strikingly, infection with SARS-CoV-2 (England 02/2020) opsonized with rCL-11 resulted in a 1.0 to 1.5 log10 increase in viral titers at 96 h postinfection, as measured by plaque assay of apical wash fluid, compared to infection with virus alone (Fig. 7 A and B).