Oh? Some are better than others? Tell me more, CDC.Summary of Recent Changes
- Added information to present similar content for masks and respirators
- Clarified that people can choose respirators such as N95s and KN95s, including removing concerns related to supply shortages for N95s
- Clarified that "surgical N95s" are a specific type of respirator that should be reserved for healthcare settings
- Clarified that some types of masks and respirators provide more protection to the wearer than others
Key Messages:
- Masking is a critical public health tool for preventing spread of COVID-19, and it is important to remember that any mask is better than no mask.
- To protect yourself and others from COVID-19, CDC continues to recommend that you wear the most protective mask you can that fits well and that you will wear consistently.
- Masks and respirators are effective at reducing transmission of SARS-CoV-2, the virus that causes COVID-19, when worn consistently and correctly.
- Some masks and respirators offer higher levels of protection than others, and some may be harder to tolerate or wear consistently than others. It is most important to wear a well-fitted mask or respirator correctly that is comfortable for you and that provides good protection.
- While all masks and respirators provide some level of protection, properly fitted respirators provide the highest level of protection. Wearing a highly protective mask or respirator may be most important for certain higher risk situations, or by some people at increased risk for severe disease.
- CDC's mask recommendations provide information that people can use to improve how well their masks protect them.
Choosing a Mask or Respirator for Different Situations
Masks and respirators (i.e., specialized filtering masks such as "N95s") can provide different levels of protection depending on the type of mask and how they are used. Loosely woven cloth products provide the least protection, layered finely woven products offer more protection, well-fitting disposable surgical masks and KN95s offer even more protection, and well-fitting NIOSH-approved respirators (including N95s) offer the highest level of protection.
Whatever product you choose, it should provide a good fit (i.e., fitting closely on the face without any gaps along the edges or around the nose) and be comfortable enough when worn properly (covering your nose and mouth) so that you can keep it on when you need to. Learn how to improve how well your mask protects you by visiting CDC's Improve How Your Mask Protects You page.
A respirator has better filtration, and if worn properly the whole time it is in use, can provide a higher level of protection than a cloth or procedural mask. A mask or respirator will be less effective if it fits poorly or if you wear it improperly or take it off frequently. A respirator may be considered in certain situations and by certain people when greater protection is needed or desired.
4. Airborne aerosols and respiratory viruses transmission
Respiratory viruses may be transmitted through indirect contact, direct contact person-to-person, large droplet spray, airborne aerosol, or a combination of all of these. Disease-carrying aerosols contain substances < 5 μm, while infectious disease physicians traditionally consider large droplet sprays to contain substances > 5 μm at close range (6.6 feet or < 2 m). It is generally believed that droplets and aerosols >5 μm settle within 6 feet away from the infected person who produces them, due to gravity (Duguid, 1946; Morawska et al., 2009; Asadi et al., 2019). Nevertheless, the use of 5 μm as a definite for these definitions is not supported by novel aerosol science, and the creation of a false dichotomy between what is considered an aerosol and what has considered a droplet undermines the notion of transmission (Klompas et al., 2020; Prather et al., 2020). The route of virus exposure is crucial to understanding transmission. Aerosols and droplets sprayed on the body and its mucous membranes, a kind of contact transmitter, while aerosols particles are inhaled by the respiratory system (Dhand and Li, 2020). This distinction now follows disease severity, infectious dose, and control strategies. At a close range, both inhalation and contact transmission pathways are possible, but in a longer range, when the droplets have settled rapidly transmission through the inhalation pathway is important. According to aerosol science, the aerosol size is not 5 μm, so an aerosol > 5 μm is inhalable and extends over 6 feet. Also, the aerosols may be formed through the resuspension of static aerosols or settled dust (Duguid, 1946; Prather et al., 2020). The virus is found in saliva or respiratory fluid, which varies in size from aerosols and droplets from 0.2 μm to 100 μm. In general, these aerosols particles and drops are produced through breathing, speaking, and talking with aerosols, coughing, and rapid drops accompanied by coughing (Dhand and Li, 2020; Heyder et al., 1986).
The CDC finally, on January 14th 2022, admitted it.
So, what does this mean? Will the CDC finally back off the mask bullshit and admit it was all theater? Of course not! Don't be silly. No, what they're going to do is double and triple down, and start specifying N-95 respirators for toddlers and everybody else. You can see it in their recommendations sheet.
Lately we've seen the various cabinet ministers and the Prime Minister out there on TV saying that wearing a mask is the wrong idea. The reason they state for this claim is that the mask "gives people a false sense of security."Translated from Official Speak: You people are too stupid to live. This is all far too complicated for your feeble minds to comprehend. Just shut up and do what you're told.
While the federal government is telling us we are a bunch of racists and we shouldn't wear masks to curb the spread of COVID-19, otherwise known as the Kung Flu, the Wuhan Flu, the Chinese Communist BioWeapon Flu, the Bat Flu, and etc... the Premiere of Ontario is saying we need to be making masks right here in Ontario instead of begging China for them.
Welcoming the removal of face coverings in schools, political commentator Sophie Corcoran breaks down as she recalls her experience of wearing a mask in the classroom.
More than 40 physicians are currently being investigated by the College of Physicians and Surgeons of Ontario (CPSO) for promoting unproven treatments for COVID-19 or sharing unverified information about its vaccines, Global News can reveal.
The revelation comes after Ontario Health Minister Christine Elliott publicly urged the CPSO to crack down on a group of doctors accused of spreading unverified medical information about the vaccines, after the situation was brought to light in a Global News investigation.
During a press conference on Wednesday morning to update Ontarians on the province’s fight against the Omicron variant, Elliott labelled the reports “extremely concerning.”
“At a time when it’s never been more important for Ontarians to have confidence in the safety and effectiveness of vaccines, this is unacceptable,” she said.
Did you notice that the CDC has apparently changed definitions?
ReplyDeleteN95 masks are NOT respirators (or at least, not in the US!)
Respirators are essentially gas masks, with replaceable filter cartridges. NIOSH rates respirators and their cartridges for specific hazards - for example, paint, weld fumes, certain dusts, etc.
Those are what you really need for respiratory protection, and under US Law, companies need to provide respiratory protection that addresses the hazard, have to fit test the workers, and have to train them in proper handling.
Under US law and case history, anything else is legally NOT respiratory protection
Yes, they are trying to pretend that the "dust-mask" style N-95 filters are respirators now. Pretty stupid really, anyone who ever wore one knows the leakage around the nose area is bad. Look in the mirror after sanding drywall for an hour, you can see the dust tracks.
ReplyDeleteA mask can't protect you unless it -filters- the air. If it leaks, it's no good. The best masks are full-face units that cover the eyes. I haven't seen any fools touting those yet, I'm sure they will eventually.
Note that fire departments do not use filter masks. Because firemen deal with toxic fumes, toxic smoke particles and dangerous gasses, they use the Scott Airpak. That's basically a SCUBA tank for air supply and full-face mask with eye protection.
https://www.3m.com/3M/en_US/p/d/b5005047166/
If you want real protection from a 0.001mm virus particle, you need that level of breathing gear. Remote or canned air supply and a full-coverage HAZMAT bunny suit. That's what they use in labs.
Me, I just use hand cleaner. Haven't had a cold since 2020.