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Cell-to-cell transmission. (A) Cell-to-cell transmission of niclosamide and nitazoxanide identified by IFA. The infected cells were stained by dsRNA antibodies (red). DAPI staining (blue) was used to determine the cell nucleus. (B) The quantification of cell-to-cell transmission assay. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
