Masks at Gym

You are a moron. How did you get into this school? If you are seriously foolish enough to think Covid “disappeared” last year you should seek immediate mental help. I hope you know last year in less than the first 10 months of the year more people died than all of 2020 Covid deaths. Try reading something actually science based and educate yourself. It’s embarrassing for you:

Masks do not prevent virus respiratory illness. Size matters! Viruses are 50x smaller than bacteria and 1000x smaller than a hair size of bacteria = 5 micrometer (5 μm) size of particles in wood smoke (wildfire): 0.4-0.7 micrometers (0.5 μm) size of virus = 0.1 micrometer (Influenza and SARS-CoV-2) (0.1 μm) comparison: human hair is 100 micrometers (100 μm) (one million micrometers = one meter)

CDC: “Cloth masks do not catch small harmful particles in smoke.”

Penetration of cloth masks by particles was 97% and medical masks 44%, 3M Vflex 9105 N95 (0.1%), 3M 9320 N95 (<0.01%). • Moisture retention, reuse of cloth masks and poor filtration may result in increased risk of infection. • The virus may survive on the surface of the face- masks • Self-contamination through repeated use and improper doffing is possible. A contaminated cloth mask may transfer pathogen from the mask to the bare hands of the wearer. • Cloth masks should not be recommended for health care workers, particularly in high-risk situations, and guidelines need to be updated.

Filter efficiency was measured across a wide range of small particle sizes (0.02 to 1 μm) at 33 and 99 L/min. • N95 respirators had efficiencies greater than 95% (as expected). • T-shirts had 10% efficiency, • Scarves 10% to 20%, • Cloth masks 10% to 30%, • Sweatshirts 20% to 40%, and • Towels 40%. • All of the cloth masks and materials had near zero efficiency at 0.3 μm, a particle size that easily penetrates into the lungs. • Another study evaluated 44 masks, respirators, and other materials with similar methods and small aerosols (0.08 and 0.22 μm). • N95 FFR filter efficiency was greater than 95%. • Medical masks – 55% efficiency • General masks – 38% and

• Handkerchiefs – 2% (one layer) to 13% (four layers) efficiency. • Conclusion: Wearing masks will not reduce SARS-CoV-2. • N95 masks protect health care workers, but are not recommended for source control transmission. • Surgical masks are better than cloth but not very efficient at preventing emissions from infected patients. • Cloth masks will be ineffective at preventing SARS-CoV-2 transmission, whether worn as source control or as personal protective equipment (PPE).

/r/UCSD Thread Parent