武漢肺炎疫情持續擴散，市面上口罩供應仍然緊張，市民搶口罩的情況繼續出現。之前就有人指出N95防塵口罩未必有效阻隔飛沫傳播，但最近美國著名生產商3M就表示，原來N95防塵口罩有效過濾有害微粒達95%、亦可以減少吸入空氣內的非油性微粒。除此之外，3M公司亦有列出其他口罩種類的所需規格及標準，當中包括Nexcare掛耳式口罩、KN95 PM2.5 懸浮粒子防護口罩、舒適保暖口罩等等。
3M公司近日在官方網站指出，3M™N95醫用防護口罩及3M™N95防顆粒口罩有同樣功能，一樣有效過濾有害微粒達95%、亦可以減少吸入空氣內的非油性微粒。
3M公司續指，3M™N95醫用防護口罩及3M™N95防顆粒口罩的分別在於3M™N95醫用防護口罩通過防濺能力測試 (Fluid resistant test)，適合醫護人員作業時使用。
3M公司表示，佩戴3M™N95醫用防護口罩及3M™N95防顆粒口罩對預防傳染病有一定程度的幫助，建議市民如不能購買外科口罩亦可購買N95防顆粒口罩以減低飛沫傳播機會。
除了N95口罩外，3M亦有為其他口罩的規格和效用作出研究，按下圖睇詳情。
3M公司亦表示正在增加醫用外科口罩及呼吸防護產品的產量，與各醫療機構保持聯繫，為醫護人員提供相關的防護產品，並與分銷商合作以跟進存貨。
資料發圖片來源：3M
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