This is very short, and awesome. The events at 1:05 were new to me. I didn't realize that the host cell had proteins carrying out a necessary step between bind

This is very short, and awesome. The events at 1:05 were new to me. I didn't realize that the host cell had proteins carrying out a necessary step between binding of the spike protein to the ACE2 receptors, and the merging of the virus with the cell. Amazing.