[Elsie]

 

2.2.1. Face Masks

Face masks are loosely fitted devices that cannot avoid leakage around the mouth upon breathing. These are commonly made of single-layer fabrics including cotton, silk, chiffon, flannel, various synthetics, and their combinations; however, the efficiencies improved when multiple layers are used with a combination of fabrics. (63) They only provide a physical barrier against large respiratory droplets. (64) Usually, these devices are worn by suspected or confirmed COVID-19 patients to prevent the spreading of the droplets generated by the wearer in accordance with CDC recommendations. (65) However, they are not approved by NIOSH.

 

2.2.2. Surgical Masks

These are also loose-fitting and do not prevent leakage around the mouth upon inhalation. They are fluid-resistant and provide a physical barrier against body fluids and other hazardous fluids. They are not considered a form of respiratory protection. The FDA classified these masks as medical devices.

[mewzilla]

As a surgeon once put it to me: they wear surgical masks to keep them from hocking a loogie into a patient.

[EVO X]

Interesting observation.

https://twitter.com/MCCCANM/status/1596598978522775552KC-10

KC-10 Driver ✈️ 👨‍✈️ B-737 Wrangler
@MCCCANM
Watching Twitter Public Health ‘experts’ melt down over the last two days reminds me of a problem we used to have in aviation: unchecked authority & ego.

We worked VERY hard to get rid of it. Some may wish to take notes…a 🧵