P/S: This is just an idea, you may use any kind materials that you think you will get protected against viruses. You could even use coffee filter as recommended by the commenters for better protection. My intention is to provide a solution for those who unable to get protection mask, especially critical places. Hope you all understand my intent.
Forest by Vlad Gluschenko https://soundcloud.com/vgl9
Creative Commons — Attribution 3.0 Unported — CC BY 3.0
Free Download / Stream: https://bit.ly/forest-vlad-gluschenko
Music promoted by Audio Library https://youtu.be/OMjF_LLOiC0
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