Wearing a mask will increase the resistance to airflow, making it difficult for people to inhale the...
Epidemiology expert Zeng Guang said in an exclusive interview with CCTV reporters that wearing a med...
The main route of transmission of the new coronavirus is the spread of respiratory droplets. In prot...
While N95 masks were purchased and used in large quantities, how to deal with them after use became ...
Whether the mask can be used again after cleaning can not be generalized, mainly related to factors ...
Medical masks are mostly made of one or more layers of non-woven fabrics.