So-called nanomasks are sold in e-shops and pharmacies. Their manufacturers promise that they will protect us from bacteria and viruses more effectively than cotton masks. We bought several nanomasks and had them tested by nanomaterials experts.
Report Author: Kateřina Blechová
https://www.ceskatelevize.cz/porady/1097429889-cerne-ovce/220452801081104/video/799135