Let's ask the people who really know - those who train doctors and other professionals on how to wear masks and protective equipment...
OSHA mask experts Tammy Clark & Kristen Meghan break down vital information on masks, PPE (Personal Protective Equipment), and their role in COVID-19 prevention. Are they useful? Unuseful? Dangerous in any way?
Every adult on this planet wearing a mask needs to hear this riveting discussion!
Video link and alternative link.
Source (original full length video): https://thehighwire.com/videos/mask-whistleblowers-tell-all/