I can check tlavagabond, thanks for the guidance. He does great work too. If you happen on something, cool. If not, cool too. It's my favorite thing to argue but, shockingly, all the PMS/NIH studies I had collected have been changed!!!
I found something perfect from the WHO. A beautiful list of reasons why people should not wear the things:
Potential harms/disadvantages
The likely disadvantages of the use of mask by healthy people
in the general public include:
• potential increased risk of self-contamination due to the
manipulation of a face mask and subsequently touching
eyes with contaminated hands;(48, 49)
• potential self-contamination that can occur if nonmedical masks are not changed when wet or soiled. This can create favourable conditions for microorganism to
amplify;
• potential headache and/or breathing difficulties,depending on type of mask used;
• potential development of facial skin lesions, irritantdermatitis or worsening acne, when used frequently for long hours;(50)
• difficulty with communicating clearly;
• potential discomfort;(41, 51)
• a false sense of security, leading to potentially lower adherence to other critical preventive measures such as physical distancing and hand hygiene;
• poor compliance with mask wearing, in particular by young children;
• waste management issues; improper mask disposal leading to increased litter in public places, risk of contamination to street cleaners and environment hazard;
• difficulty communicating for deaf persons who rely on lip reading;
• disadvantages for or difficulty wearing them, especially for children, developmentally challenged persons, those with mental illness, elderly persons with cognitive impairment, those with asthma or chronic respiratory or
breathing problems, those who have had facial trauma or recent oral maxillofacial surgery, and those living in hot and humid environments.
I found this list as well, hope it helps :)
5 NIH studies from 2004-2020 all finding verifiable health effects from wearing a face mask, including scientifically verified reduction is blood oxygen level:
https://pubmed.ncbi.nlm.nih.gov/29395560/
https://pubmed.ncbi.nlm.nih.gov/32590322/
https://pubmed.ncbi.nlm.nih.gov/15340662/
https://pubmed.ncbi.nlm.nih.gov/26579222/
https://pubmed.ncbi.nlm.nih.gov/31159777/
If this is what I think it is, I thank you, and have already used it a number of times. I'm tickled pink that you remembered though. Gonna go have a look now. I suspect it's page eight of a WHO document from June, which has been a very useful document.