person holding cigarette reference Hand with Drawing References and Sketches for Artists Smoking reference sheet -preview

Dust, pet dander, and other types of particulate matter may contain bacteria, viruses, and mold spores, which can grow inside the filter. He says some air purifiers have UVC (Ultraviolet-C) and ionization features that can deactivate or kill these microorganisms, prolonging the filters life and reducing re-exposure risks when replacing the filter

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Incapsula incident ID: 382000750010510462-39649682107798225

After a few hours, check on the cigarettes to see if they are moist

doi:10.1161/CIR.0b013e3181dbece1 Choudhury AH, Gordian ME, Morris SS (1997) Associations between respiratory illness and PM10 air pollution