Figure 2From: The microbiological quality of air improves when using air conditioning systems in cars Change in the concentration of particles and microorganisms. Geometric mean (for pathogens and fungal spores)/arithmetic mean (for particles) and 95% confidence interval of the reduction of total number of pathogens, number of fungal spores, and number of particles during use of different modes of the AC system (outside air, inside air, variable use).Back to article page