It is the strangest thing in the world to have a mixer draw air into your lungs, the first victim (mixer) was a casualty of the virus quest. That was the reasoning for the planetary chains.this is definitely anyone’s last resort, but if needed there are a lot of mixers, also if it were possible to assist someone before needing ventilation? By the time someone needs a vent it’s a bad day. But if everyone had fixitfranks breathing buddy maybe less would slide into needing a vent. I’m not a doc, but I go to the doctor, also I figured out that everything on the must be true. But I’ll tell ya this works. Stay healthy, and as usual I need some help