Viruses don't circulate bare in the air. Droplets containing viruses do. It's thought that it's mostly carried within droplets that are 5um or larger. Just i

Viruses don't circulate bare in the air. Droplets containing viruses do. It's thought that it's mostly carried within droplets that are 5um or larger. Just in case smaller particles have a substantial role, I quoted the 1um number.