Replies

To: Red Badger

Define "mask".

If you can't provide the technical specifications and the procedure for fitting, then you can't make any scientific claims regarding effectiveness.

3 posted on 02/16/2021 9:51:33 AM PST by G Larry (Authority is vested in those to whom it applies.)

To: G Larry

20 posted on 02/16/2021 10:06:44 AM PST by kvanbrunt2

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