Funny, CDC said the same thing back in 2010..........
Somewhere early on in the Covid last year, there was a report (from the Surgeon General before he got on board?) that stated the CDC had conducted something like 10 statistically significant double blind trials with masks since the 1960's. Exactly zero of the 10 showed any statistical reduction in the transmission of cold and flu like viruses (eg: Covid). That report / comment was quickly covered over in the rush to gain control of the narrative.
They used the charade to crash the strongest economy ever, and to get Trump out of office. They can allow some modicum of truth to start trickling out again now that Uncle Joe is in control...
That report actually disappeared from the CDC website for a short period of time. That's when I knew for a fact that the whole thing was a complete sham.
CDC has published many papers on the ineffective nature of masks for virus particles. Text book are ripe with homework that gives the miserable numbers, and the resulting analysis for designs such as cleanrooms. Study of particles at viral size are bread and butter for industries like semiconductors and biology.
From the CDC below
https://wwwnc.cdc.gov/eid/article/26/5/19-0994_articleA-Z Index
ISSN: 1080-6059
EID Journal
Volume 26
Number 5—May 2020
Main Article
Volume 26, Number 5—May 2020
Policy Review
Nonpharmaceutical Measures for Pandemic Influenza in Nonhealthcare Settings—Personal Protective and Environmental Measures
Highly Pathogenic Avian Influenza A(H5N8) Virus in Swans, China, 2020 Susceptibility to SARS-CoV-2 of Cell Lines H5N6 Viruses in Wild Whooper Swans, Mongolia More articles on Influenza
Jingyi Xiao1, Eunice Y. C. Shiu1, Huizhi Gao, Jessica Y. Wong, Min W. Fong, Sukhyun Ryu, and Benjamin J. CowlingComments to Author
Author affiliations: University of Hong Kong, Hong Kong, China
Snip from article below:
Disposable medical masks (also known as surgical masks) are loose-fitting devices that were designed to be worn by medical personnel to protect accidental contamination of patient wounds, and to protect the wearer against splashes or sprays of bodily fluids (36). 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.
