Extended Data Fig. 1: SARS-CoV-2 variants Delta, BA.1 and BA.2 induce syncytia in S-Fuse cells.

S-Fuse cells that become GFP + upon cell-cell fusion were exposed to the indicated SARS-CoV-2 strains. After 20 h, cells were stained with Hoechst to visualize nuclei. Syncytia (green) and nuclei (blue) are shown. Representative images from three independent experiments are shown. Scale bar, 500 μm.