But can’t the problem just be fixed using things like decontaminants, filters, ultraviolet lights, and air purifiers?
No. The source must be identified and eliminated before a building can return to “normal.” Attempts to destroy the fungal colonies with so-called decontaminants usually produce hardier strains of the fungi, which are resistant to the chemical previously used on them. Most filters cannot trap the tiny and light-weight microbial spores circulating in a building. Ultraviolet light can kill some microbial spores, but it is very difficult to get enough light on them for a long enough time to destroy them. For these types of reasons, most so-called air purifiers are a sham. Ion generators, ozone generators, ozonators, and similar products cannot eliminate the sources of indoor air contaminants.
