Stephen Petty (Industrial Hygienist): Ventilation is far better than Facemasks to control Aerosols

Download the booklet in spanish about facemasks (pass: sagen010):
https://www.mediafire.com/file/fxia1qm0tmtvzge/

In this interview, Stephen Petty explains what is an Industrial
Hygienist, what is the hierarchy of controls, the "monkey study" that
showed that 87% of the particles emitted by the mouth are aerosols and
how to actually control the spread of viruses.
Original video: https://www.youtube.com/watch?v=I3dor-4Af2A