N95 respirators are designed to fit closely to the face and filter out at least 95% of airborne particles, whereas surgical masks fit more loosely and were originally designed to prevent the wearer from infecting others.
从设计层面上讲:N95呼吸器设计时更考虑面部密闭性,可去除至少95%的空气粒子,但外科口罩面部密闭性较N95要差,设计目的是防止佩戴者感染其他人。这也从根本上说明了其实验层面上的不同,而实际应用层面的效果受到多种因素的影响,得出两者相似的结果也不足为奇。