Adult mask standard:
1. Medical surgical mask, YY0469-2011; 2. Industrial dust mask, GB2626-2006/2019; Medical protective mask, GB19083-2010. In addition, various countries and regions will also promulgate their own mask standards. For example, the standard formulated by the National Institute of Occupational Safety and Health (NIOSH), common models are N95 and N99 masks, and FFP1, FFP2, and FFP3 masks that meet EU standards. Medical surgical masks, medical protective masks, N95, FFP2 can all be used for protection in medical institutions. KN95 cannot be used in medical institutions, but ordinary people can choose to use it for epidemic prevention. "