I agree with mike a comment. I have to scanned so far and will read it in more detailed later but from the what I have read so far that seems to be the gist of it..
CDC Journal 5/1/20: Masks Don’t Work
Face masks might help prevent the spread of some infections, but there’s no proof that they work with Covid-19 or influenza: “We did not find evidence that surgical-type face masks are effective in reducing laboratory-confirmed influenza transmission, either when worn by infected persons (source control) or by persons in the general community to reduce their susceptibility.
CDC Journal 5/1/20: Face Masks Don’t Work When Worn By The Sick Either
“There is limited evidence for their effectiveness in preventing influenza virus transmission either when worn by the infected person for source control or when worn by uninfected persons to reduce exposure. Our systematic review found no significant effect of face masks on transmission of laboratory-confirmed influenza.”
CDC Journal 5/1/20: Don’t Wear A Dirty Mask, It Can INCREASE The Risk Of Covid Transmission
“Proper use of face masks is essential because improper use might increase the risk for transmission. Thus, education on the proper use and disposal of used face masks, including hand hygiene, is also needed.”
The following from WHO is listed as behavior that can increase transmission:
Touching a mask in use
Touching a clean mask with unwashed hands
Not washing hands every time after touching a dirty mask
Wearing a mask that is not new and clean
Continuing to wear a mask after it has become damp, instead of immediately replacing it
Re-using a single-use mask
Not discarding a single-use mask immediately upon removal, as opposed to leaving it in the immediate environment
The recent rise in COVID-19 cases in Maine could be linked to the prolonged use of face masks by the general public. Scientific data collected in randomized controlled trials over the past sixty years has shown consistently that the use of face masks to stop respiratory viruses is not only ineffective, but face masks may actually cause an increase in respiratory illnesses such as influenza and COVID-19.
New Study Reveals Risks of Prolonged Mask Wearing
The U.S. CDC reported a meta-analysis of 10 face mask studies in its medical Journal, Emerging Infectious Diseases1 which concluded face masks do not work to prevent transmission of respiratory viruses.
One of the key studies cited in that CDC report was of 1607 hospital workers in Vietnam, published in the journal BMJ Open on April 22, 2015.2 The study concluded that the use of surgical masks to control viral spread (which they are not designed to do, anyway) was negligible and that the prolonged use of the iconic cloth masks, so popular in today’s society, actually increased the cases of respiratory illness significantly.
Furthermore, a more recent study conducted by the US CDC’s COVID-19 Response Team and published in the CDC’s Morbidity and Mortality Weekly Report3 showed that there is a 20 times greater chance of catching COVID-19 with prolonged wearing of a face mask when compared to those who never wore a face mask.
Full article & detail via link: https://21stcenturywire.com/2020/11/16/maines-rise-in-covid-19-cases-linked-to-face-masks/
Interestingly, it appears this study as been culled.
Also investigated but NOT published were these bits:-
Another copy and paste not read it all in detail again but its info for people to read and comment on.
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