Indoor air environment contains a complex mixture of biological contaminants such as bacteria, fungi, viruses, algae, insects, and their by-products such as endotoxins, mycotoxins, volatile organic compounds, etc. Biological contaminants have been categorized according to whether they are allergenic, infectious, capable of inducing toxic or inflammatory responses in human beings. At present, there is a lack of awareness about biological contamination in the indoor environment and their potential sources for the spreading of various infections. Therefore, this review article examines the association of biological contaminants with human health, and it will also provide in-depth knowledge of various biological contaminants present in different places such as residential areas, hospitals, offices, schools, etc. Moreover, qualitative and quantitative data of bio-contaminants in various indoor environments such as schools, hospitals, residential houses, etc. have also been derived from the recent literature survey.

室内空气环境中含有细菌、真菌、病毒、藻类、昆虫等生物污染物及其副产物如内毒素、霉菌毒素、挥发性有机化合物等的复杂混合物。生物污染物已根据其是否具有致敏性进行分类，传染性，能够在人类中诱导毒性或炎症反应。目前，人们对室内环境中的生物污染及其传播各种感染的潜在来源缺乏认识。因此，这篇综述文章探讨了生物污染物与人类健康的关系，还将深入了解住宅区、医院、办公室、学校等不同地方存在的各种生物污染物。此外，