(Or click the long SOTT (Sign of the Times) link below the pic.)
The Science is Conclusive: Masks and Respirators
do NOT Prevent Transmission of Viruses.
From the well sourced article:
"...Conclusion regarding masks that do not work
RCT study with verified outcome shows a benefit for HCW
or community members in households to wearing a mask or
respirator. There is no such study. There are no exceptions.
Likewise, no study exists that shows a benefit from a broad
policy to wear masks in public (more on this below).
Furthermore, if there were any benefit to wearing a mask,
because of the blocking power against droplets and aerosol
particles, then there should be more benefit from wearing a
respirator (N95) compared to a surgical mask, yet several
large meta-analyses, and all the RCT, prove that there is no
such relative benefit. Masks and respirators do not work.
Precautionary Principle turned on its head with masks
In light of the medical research, therefore, it is difficult
to understand why public-health authorities are not
consistently adamant about this established scientific
result, since the distributed psychological, economic and
environmental harm from a broad recommendation to wear masks
is significant, not to mention the unknown potential harm
from concentration and distribution of pathogens on and from
used masks..."
~Easy