abstract: In connection with the COVID-19 pandemic in the spring of 2020, an unprecedented situation has developed with masks and respirators protecting respiratory organs.The purpose of the mask (respirator) is to protect the person from drops of liquid that the COVID-19 carrier spreads around themselves when coughing/sneezing.Unfortunately, low-cost, non-professional and home-made masks and respirators let in a significant amount of droplets.An ideal solution would be to treat a cheap or even a makeshif
journal: Intellectual Archive