No, some molds can produce mycotoxins, which are toxic substances that may be found either within or on the surface of mold spores. Mycotoxins can enter a person's system through ingestion, inhalation or skin contact.
All spores found in indoor air are also normally found in outdoor air because most originate or live in the soil and on
dead or decaying plants. Therefore, it is not unusual to find mold spores in indoor air.