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戴口罩——应选用纱布、纸质稍厚口罩或N95型口罩,棉纱口罩要戴16层以上。N95型虽然最能阻隔病毒,但长者或哮喘病人及呼
Wear masks - should use gauze, paper thicker mask or N95-type mask, cotton mask to wear more than 16 layers. Although N95 most resistant to viruses, but elderly and asthma patients and call