A scientific reason to wear a mask

I have discovered an effective use for wearing a mask. In this video, I quickly explain the science.

Music in this video: RC the Rapper - " friends "
( official video)
https://youtu.be/-IXe51WyK3o

TO SEE MY OTHER VIDEOS :

A reason NOT to wear a mask -
https://www.bitchute.com/video/Kqf2uph0HCJo/

100 Reasons NOT to wear a mask
https://www.bitchute.com/video/tjYYL87glMBT/

100 More reasons NOT to wear a mask -
on Bitchute https://www.bitchute.com/video/QbRL73RmDyod/

100 More reasons NOT to wear a mask -
on Rumble
https://rumble.com/vgbpnh-100-more-reasons-not-to-wear-a-mask.html