I quote
Why does soap work so well on the new coronavirus and, indeed, most viruses? Because it is a self-assembled nanoparticle in which the weakest link is the lipid (fatty) bilayer.
That sounds scientific. Let me explain.
Soap dissolves the fat membrane around the virus and the virus falls apart like a house of cards and “dies,†or rather, it becomes inactive as viruses aren’t really alive. Viruses can be active outside the body for hours, even days.