莊武龍醫師:控糖筆記、運動、生活及旅遊隨筆,
載兩層口罩對病毒更有防護力❗️ 看到連口罩都沒戴的 請互相提醒一下🙏
載兩層口罩對病毒更有防護力❗️ 看到連口罩都沒戴的 請互相提醒一下🙏
In February 2021, the CDC released results of a study assessing how best to improve fit and effectiveness of medical procedure…
Is your mask providing adequate protection? 😷 New CDC recommendations specify that masks should be tightly fitted along the…
This report describes experiments conducted by CDC to assess ...