WHICH MASK WILL PREVENT THE INHALING OR EXHALING OF AEROSOLS? CLOTH MASK: AEROSOL PASSES THROUGH; LEAK TEST: FAILED; SURGICAL MASK: AEROSOL FOLLOWS THE PATH OF LEAST RESISTANCE - AROUND THE MASK; LEAK TEST: FAILED; NEITHER ONE; THE AEROSOL DOESN'T CARE; THE MASK IS NOT RIGHT - IF IT'S NOT AIR TIGHT