Physicochemical properties of respiratory droplets and their role in COVID-19 pandemics: a critical review
Ting Ge1,*(), Shengfeng Cheng2,*()

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Figure 1.. Schematic illustration of the different transmission routes of respiratory tract viruses via large (≥ 100 μm), intermediate (~10-100 μm), and small (< 5 μm) droplets.