Researchers at the CDC in January conducted experiments to see how well wearing a cloth mask over a surgical mask and nodding the ear loops of a surgical mask and then tucking the excess material close to the face protects against Cove in 19.

美國疾病預防控制中心的研究人員在1月份進行了實驗，看看在手術口罩上戴上布口罩，並將手術口罩的耳環點住，然後將多餘的材料塞到靠近臉部的地方，可以很好地防止科夫在19。

They found that both of these methods helped reduce the exposure to potentially infected aerosols by more than 90% in laboratory simulations.

他們發現，在實驗室模擬中，這兩種方法都有助於減少對潛在感染氣溶膠的接觸，減少了90%以上。

CDC Director Rochelle Wolinski New data released from CBC today underscore the the importance of wearing a mask correctly and making sure it fits closely and snugly over your nose and mouth nationwide.

疾病預防控制中心主任Rochelle Wolinski今天從CBC發佈的新數據強調了正確佩戴口罩的重要性，並確保它在全國範圍內緊密和貼合你的鼻子和嘴巴。

The daily tallies of new cases and hospitalizations from Cove in 19 have been dropping steadily in recent weeks.

最近幾周，科夫的每日新病例和住院人數統計在19日穩步下降。