Clostridioides difficile 1 Enterococcus spp 1 Humanities 1 MRSA 1 Social interaction 1 Staphylococcus aureus 1 air cleaner 1 air quality 1 antimicrobial resistance 1 bacterial aerosol (BA) 1 biological air pollutants 1 decentralized façade ventilation 1 fungal aerosol 1 fungi 1 gymnastic hall 1 heterotrophic bacteria 1 indoor air indoor air quality 1 indoor microclimate 1 life cycle assessment 1 mannitol-positive staphylococci 1 microbiological contamination 1 microbiological indoor air quality (MIAQ) 1 multi-antibiotic resistance (MAR) 1 radiant catalytic ionization 1 size distribution 1