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Number of new coronavirus cases reported in South Korea tops China for first time | South China Morning Post
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Investigation of Mask Efficiency for Loose-fitting Masks against Ultrafine Particles and Effect on Airway Deposition Efficiency - Aerosol and Air Quality Research
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There's been a run of surgical masks in the US because of the coronavirus scare. You don't need them, physicians say | CNN
![Masks are mandatory for airport staffs now. They should provide actual N95 mask instead of this junk. (Jeju Airport) : r/korea Masks are mandatory for airport staffs now. They should provide actual N95 mask instead of this junk. (Jeju Airport) : r/korea](https://preview.redd.it/h3v8ngrq1md41.jpg?auto=webp&s=5ddcd25e87cf8ac3ce3eeab7e08be5e7a0c4598c)