Can airborne fungal allergens pass through an air conditioning system?

States that on using the ELISA inhibition test against Aspergillus fumigatus, the study found that air samples from air conditioned rooms showed inhibition of the serum activity of a highly sensitized patient. Concludes that although an important fraction of aeroplankton particles can be filtered out of air conditioning systems, airborne allergens can nevertheless pass both coarse and fine filters.