According to WHO, Coronavirus or covid 19 is NOT sirborne.
The way that the virus spreads is through droplets that come out from your mouth or nose when you cough, sneeze or speak. When an infected person coughs or sneezes, droplets from that person can fall on the the next person close by or on a surface where it can stay alive for a while. So it’s important to keep a distance of at least 1 meter from people at this time.
Because when these droplets come out, they go in a certain direction and they settle down.
Also when these droplets come out and fall on surfaces, they can stay alive on that surface for a while. So when one touches that surface, the hand becomes contaminated.
So when you use the hand to touch your mouth, nose or eyes, that person becomes infected. It is really critical that people wash their hands. Because if the virus is on the hands, it can be killed by washing the hands with soap and running water. And if there’s no soap and water close by, one can use an alcohol based rub.