How to reduce the overall amount of yeast/mold in a room's environment?

How to reduce the overall amount of yeast/mold in a room's environment? I am looking to reduce as much yeast/mold as possible in a room. I understand that yeast/mold is prevalent almost everywhere. The goal is to reduce it as much as possible in a closed environment/apartment using a standalone/portable unit if possible. A cursory search points to UV filters, HEPA filters, and ionization to accomplish this. Is there any evidence that one method may be more/less effective or are there other solutions that are worth considering? I am trying to reduce my exposure to mold and yeast in a room with normal HVAC. I am not trying to diagnose a specific source or issue related to the apartment specifically. I am trying to reduce my exposure as I have an allergic response to yeast/mold in general.