PPE Forensic Engineer who got KY mask mandate overturned MASKS DON’T WORK – here’s the science

During a 15-min presentation before the New Hampshire Senate Health and Human Services Committee in March, Stephen Petty, a certified industrial hygienist, certified safety professional, professional engineer, and court expert witness of 400 cases/trials, and with 45 years of experience in the field – explained there was never any control group testing to verify masks actually do work

h/t DeploraVision