Airborne Diseases - Among various modes of disease transmission, air is one of the important routes and a number of diseases have been shown to be transmitted through air. Since human beings and animals are continuously inhaling the external air, the chances for an airborne microorganism to find a host and cause infection are more.

Most of the respiratory tract infections are acquired by inhaling the air containing the pathogen. Microorganisms in droplets and infectious dusts and spores can be easily disseminated through air. Some of the respiratory diseases, which have an airborne mode of transmission, are briefly described in the following section.