Dr. Sylvie Briand, Global Infectious Hazard Preparedness, WHO: "For people who have no symptoms, the masks will not necessarily protect them 100% because if they don't apply other measures it's not sufficient. So my message is that (a) mask alone is not enough." #對於沒有病徵的人來說,口罩是不一定能提供百分百的保護,如果他們不採取其他措施,僅靠口罩是不夠的。