I have been saying this for over a year. Plenty of examples here at DP
Mask don’t work
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Study Finds Face Masks Didn’t Slow Spread Of Covid-19
The first ecological study of state mask mandates and their use to include data from the winter case spike has found that widespread mask-wearing likely didn’t slow the spread of COVID-19.
The
study, conducted by the University of Louisville using data from the Centers for Disease Control and Prevention, found that “80% of US states mandated masks during the COVID-19 pandemic,” but while “mandates induced greater mask compliance, [they] did not predict lower growth rates when community spread was low (minima) or high (maxima).” The study also found that “mask mandates and use are not associated with lower SARS-CoV-2 spread among US states.”
www.dailywire.com
Since the appearance of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the question regarding the efficacy of various hygiene measures and the use of personal protective equipment (PPE) has become the focus of scientific and above all public ...
www.ncbi.nlm.nih.gov
Or here...
A study from Philipps University Marburg in Germany describes the best face masks to wear in different situations to protect against Covid-19
www.nsmedicaldevices.com
A study from Philipps University Marburg in Germany describes the best face masks to wear in different situations to protect against Covid-19
"...The study’s authors say that for the best combination of optimum resistance against Covid-19 particles and ease of breathing, a face masks should combine good filtration with a low drop in pressure.
Dr Sterr said: “In our tests, respirators had two to three-fold higher airflow resistances than surgical face masks.
“This might lead to lower user adherence and, consequently, to a lower overall protection rate.
“Therefore, it seems reasonable to widely use surgical face masks in hospitals to prevent the virus from spreading, especially if distancing and quarantining are not possible.
“In situations where a patient cannot wear a mask (e.g. intubation), a surgical face mask does not seem sufficient to protect the healthcare worker from SARS-CoV-2.
“In such cases, respirators such as FFP2 masks should be considered.
“KN95 respirators should be worn only if other respirators are not available.”
The results of the Philipps University Marburg study match the warnings given by the EU Rapid Exchange of Information System (RAPEX) against the KN95 masks made in China."
en.wikipedia.org
"..Some N95 respirators have also been cleared by the
U.S. National Institute for Occupational Safety and Health (NIOSH) and
U.S. Food and Drug Administration as
surgical and are labeled "surgical N95", "medical respirators," or "healthcare respirators". These protect the patient and others from the wearer's respiratory emissions (as a surgical mask would) as well as protect the wearer from airborne particulates and aerosols (as a standard N95 respirator). Unlike a standard N95 respirator, FDA-cleared "healthcare respirators" also provide protection from high-pressure streams or jets of bodily fluid, such as blood.
[15][16]
The CDC recommends the use of respirators with at least N95 certification to protect the wearer from inhalation of infectious particles including
Mycobacterium tuberculosis,
avian influenza,
severe acute respiratory syndrome (SARS),
pandemic influenza, and
Ebola.
[17] ..."