1986. A review of the health effects of relative humidity in indoor environments suggests that relative humidity can affect the incidence of respiratory infections and allergies. Experimental studies on airborne-transmitted infectious bacteria and viruses have ...

(2019). "deeper understanding and more efficient utilization of bioaerosol studies to prevent public health hazards" "Mycotoxins, defined as secondary metabolites of fungi, are harmful indoor-air contaminants associated with mold growth in buildings and are known to cause several diseases such as cancer, hepatitis, and nephritis (Jarvis and Miller 2005). A component in the cell wall of fungi, (1→3)-β-d-glucan, is believed to play a role in pulmonary inflammation, increased sensitivity to endotoxins, and pulmonary embolisms."

(2008). Airborne Fungal and Bacterial Levels Associated With the Use of Automobile Air Conditioners or Heaters, Room Air Conditioners, and Humidifiers. Archives of Environmental & Occupational Health: Vol. 63, No. 3, pp. 101-107.