9210+都夠 但一定要戴岩 唔好有空氣入/出 咁先密實
見到有人打乞嗤/咳嗽要走開啲 (9210唔防飛濺液體 e.g.口水)
參考CDC (美國疾病管制與預防中心)
People with flu can spread it to others up to about 6 feet away.
打乞嗤/咳嗽大概可以飛1.83米 (1 feet = 30.48 cm)
Source:
https://www.cdc.gov/flu/about/disease/spread.htm
唔好彩戴冇Fluid resistant既口罩而中左口水最好換盡快第二個口罩
題外話:
我覺得摺疊口罩9010同9210+感覺上係差唔多
9010 市面上容易搵到 價錢大概$7-$10/個 but Made in China
9210+ 價錢應該比較貴(我睇Amazon比較) 唔知香港賣幾錢 但適合wide range of face sizes