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Airborne transmission is one of the environmental dissemination pathways of antibiotic resistance genes (ARGs), and has critical implications for human exposure through inhalation. In this study, we focused on three regions of China to reveal some unique spatiotemporal features of airborne bacteria and ARGs in fine aerosols (PM2.5): (1) greater seasonal variations in the abundance of bacteria ...

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Jun 05, 2018 · Why is it called 2.5? The 2.5 in PM2.5 refers to the size of the pollutant in micrometres. Bear with us here while it gets a bit mathematics-y! Micrometres have this symbol: µm and are equivalent to 0.001 millimetres. The smallest thing that the average human eye can perceive is about 0.1 millimetres, which is around the same width as a human hair.

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Inhale filter zone: the filter can trap very fine particles can be as small as 0.1μm, including pollen (5-200μm), mites (125μm), allergens (0.8-30μm), air-droplet (3-20μm) and pollution (10μm) Exhale valve: quick air emission helps moisture control and reduce fogging on eyeglasses for better comfort and safety

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