It's Now Official － CDC建議外出戴布口罩

CDC's Recommendation Regarding the Use of Cloth Face Coverings, Especially in Areas of Significant Community-Based Transmission
 

醫用口罩(surgical masks or N-95 respirators)緊缺，留給醫護人員
注意戴和摘口罩的正確方法

無論哪種口罩，不要戴了口罩就放鬆維持社交距離