FFP2, KN95, Surgical mask or home made face mask? Which one is the best? There are different type of masks available in the market, and it is important to know the differences between them. So how to choose the right one?
How to use FFP2 respirator correctly? Maybe you already wear the mask with filtration efficiency of 95%. Do you know, that if you are wearing the face mask on wrong way, the efficiency going down?