Transmitted through the air, as in the case of a contagious virus. Some viruses can create tiny particles that, when released into the air from an infected person, can float in the air for hours and infect someone else who enters that area and inhales them. Airborne diseases are very contagious. Researchers are trying to find out if SARS-CoV-2, the coronavirus that causes COVID-19, can be spread in this way.
SOURCE: John Hopkins Medicine