國務院應對新型冠狀病毒肺炎疫情聯防聯控機制近日印發《公眾科學戴口罩指引》。
Medical masks and surgical masks are sufficient for normal use, and wearing multiple masks does not provide more protection, according to the guideline.
指引指出，醫用口罩或醫用外科口罩可用於普通防護，佩戴多個口罩並不能增加防護效果。
指引對普通公眾(general public)、特定場所人員(people at specific areas)、重點人員(key population groups)以及職業暴露人員(people with occupational exposure)進行分類，並對不同場景下戴口罩提出科學建議。
這些情況不建議戴口罩
普通公眾在居家(stay at home)、戶外(outdoors)，無人員聚集(no crowds)、通風良好(well-ventilated)的情況下，建議不佩戴口罩。
這些情況佩戴一次性口罩
The public is advised to carry along masks when in crowded places such as offices, shopping malls, restaurants, workshops and public transport. People in high-risk areas should wear surgical masks all the time when entering such places, while those in medium-risk and low-risk areas need to wear medical masks when in contact with others at the distance of less than 1 meter.
普通公眾處於如辦公、購物、餐廳、車間、公共運輸工具等人員密集場所時，在中、低風險地區，應隨身備用口罩，在與其他人近距離接觸(小於等於1米)時戴口罩。在高風險地區，戴一次性使用醫用口罩。
Those who have cold symptoms such as coughing or sneezing, or who live with personnel in quarantine or that have recovered from the novel coronavirus and been discharged from the hospital, are suggested to wear disposable medical or surgical masks.
對於咳嗽或打噴嚏等感冒症狀者，建議戴一次性使用醫用口罩或醫用外科口罩。對於與居家隔離、出院康復人員共同生活的人員，建議戴一次性使用醫用口罩或醫用外科口罩。
這些情況建議佩戴防護口罩
People working in places such as hospitals, train terminals, airports, prisons and nursing homes need to wear surgical masks or respirators of grade KN95/N95 or above.
醫院、火車站、機場、監獄、養老院等人員密集場所工作人員，建議戴醫用外科口罩或符合KN95/N95及以上級別的防護口罩。
The suspected cases, confirmed cases of novel coronavirus, asymptomatic cases and those who have close contact with confirmed cases are recommended to wear surgical masks or respirators with no breathing valve graded at KN95/N95 or above. Entry personnel need to wear such masks from the moment they enter the country to the end of their required quarantine.
新型冠狀病毒肺炎疑似病例、確診病例和無症狀感染者;新型冠狀病毒肺炎密切接觸者;入境人員(從入境開始到隔離結束)，戴醫用外科口罩或無呼氣閥符合KN95/N95及以上級別的防護口罩。
職業暴露人員根據工作內容及地點不同，佩戴醫用外科口罩、醫用防護口罩或送風過濾式呼吸防護器。
【相關詞彙】
帶呼吸閥的防護口罩 valved respirator
一次性口罩 disposable mask
防護物資 protective materials
護目鏡 protective eyewear