A study published by the National Institute of Health determined that masks are ‘wertlos’…. Worthless or good for nothing. The study was published online in November of 2020.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7680614/
Med Hypotheses. 2021 Jan; 146: 110411.
Published online 2020 Nov 22. doi: 10.1016/j.mehy.2020.110411
PMCID: PMC7680614
PMID: 33303303
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