硬指標:ASTM level 2 和 3,

本帖於 2022-01-12 19:56:21 時間, 由普通用戶 fuz 編輯

https://www.coronavirus.kdheks.gov/DocumentCenter/View/1416/Understanding-ASTM-Levels-for-Facemasks-PDF---7-30-20

 

https://rdimedical.com/differences-between-astm-level-face-masks-2/

Level 2 and 3 Masks

If you are at a higher risk of being exposed to COVID-19 or more importantly, have been infected, the ASTM level 2 or 3 masks should be worn. 
These will offer the best protection to others from the Coronavirus and ensure you are not cross-contaminating, provided you keep a reasonable distance from others.

 

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