Stephen Petty, Expert, Industrial Hygienist solution far more effective than masks

Stephen E. Petty, P.E., C.I.H, C.S.P. EES Group, Inc.
Speaking to the Senate Health and Human Services (03/30)

Sources:
PDF slides: https://rebuildnh.com/wp-content/uploads/2022/03/1_Petty_New_Hampshire_Legislature_Presentation_January_27_2022.pdf