It is tiniest of tiny, doesn’t even have a DNA of its own to replicate (thus needs a host to multiply, like a cuckoo). It is just a protein cell and RNA strand inside a layer of fat. Visualise a hen egg. Soap can wash away that fat and kill it, like breaking the shell of a breakfast egg. Yet, the new coronavirus is a formidable killer. It has forced about three billion people indoors around the world—unprecedented in human history.