Airborne disease is any disease that caused by pathogens and transmitted through the air. The pathogens transmitted may be any kind of microbe, and may spread in aerosols, dust or liquids. The aerosols might generate from sources of infection such as the bodily secretions of an infected animal or person, or biological wastes such as accumulate in lofts, caves, garbage etc. Airborne pathogens or allergens often cause inflammation in nose, throat, sinuses and lungs. Inhalation of these pathogens that affect a person's respiratory system or even the rest of the body. Airborne diseases can also affect non-humans. Airborne disease caused by exposure to a source: an infected patient or animal, by being transferred from the infected person or animal’s mouth, nose, cut, or needle puncture. Environmental factors influence the efficacy of airborne disease transmission; the most evident environmental conditions are temperature and relative humidity.