Abstract

Indoor air quality (IAQ) comprises a complex composition of different pollutants including biological contaminants such as
bacteria, algae, and fungi. It is noticeable that on average 2000 l of air that a person breathes every day is filled with contaminants
that will pose severe health hazards. Although many studies have repeatedly reported the health risk caused due to IAQ yet
people are still unaware of the same specifically regarding biological contaminants which act as a potential source for the cause
and spread of various diseases. Numerous infectious disorders, allergic reactions, bacterial infections, and malignancies are
the chief consequences of microbiological contaminants prominently present in indoor settings. This review paper presents
a thorough theoretical overview that covers IAQ, health risks, sources, and significant studies on microbiological pollutants
persistently present in various indoor scenarios. Further, it also illustrates the work conducted in this field by various research
professionals globally. The present review article may provide a better vision to the researchers working in this area further
helping in the regulation and implementation of standards required for various crucial indoor settings.