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Bioaerosols play a significant role in indoor air pollution as they can be pathogenic or cause allergic reactions. Indoor air contains a complex mixture of bioaerosols such as bacteria, fungi, viruses, bacterial cells and cellular fragments, fungal spores and by-products of microbial metabolism and non-biological particles e.g., dust, tobacco smoke, cooking-generated particles and motor vehicle exhaust particles. The main sources of bioaerosols in indoor air are humans themselves indoor materials e.g. textiles or wallpapers as well as outdoor aerosols. The concentrations bioaerosols in households and offices are discussed in the paper together with proposes law regulations.
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