Industrial Hygienist Breaks Down Masks.

Jessica Rojas, an industrial hygienist, breaks down the facts on masks and their effectiveness. Her assessment is far more valid than any doctor, MD, or other medical professional as this is her area of training and expertise. Not to mention, every thing she says can be backed with scientific peer reviewed studies. Claims that masks work cannot. There is not, and has never been any study proving they are effective for aerosolized particles.