市面口罩點樣分? 市面上買到嘅口罩,除左普通外科口罩,仲有防花粉同N95。防花粉口罩唔防水唔防菌,病毒更加唔洗講,飛沫hi到外層浸左入去一樣會中招。N95是全密封式兼防水,95的意思是防到95%的非油性空氣粒子,無講明filter大小,所以唔可以話佢可以防菌防病毒,但可以阻隔95%飛沫。聽落好似同外科口罩差唔多,係,已經有報告出左,證實保護力差唔多。 普遍認為N95勁過外科口罩是因為外科口罩唔夠貼面,包唔實,左右兩邊易漏風,飛沫可以入去,N95就完全包實。值得注意⚠️ N95不可長時間戴,自己呼出的二氧化碳會毒番自己,戴一陣就要抖下氣。

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