https://wwwnc.cdc.gov/eid/article/26/5/19-0994_article "... from literature published during 1946 - July 27, 2018. In pooled analysis, we found no significant reduction in influenza transmission with the use of face masks..."

Oxford Centre for Evidence-Based Medicine found that there is no evidence for the effectiveness of cloth masks against virus infection or transmission. https://www.cebm.net/covid-19/masking-lack-of-evidence-with-politics/

https://www.nejm.org/doi/full/10.1056/NEJMp2006372 New England Journal of Medicine from May 2020 came to the conclusion that cloth face masks offer little to no protection in everyday life.

Norwich School of Medicine found that “the evidence is not sufficiently strong to support widespread use of facemasks.” https://www.medrxiv.org/content/10.1101/2020.04.01.20049528v1

Oh, and here's an article about masks killing: In China, several children who had to wear a mask during sports classes fainted and died; the autopsies found a sudden cardiac arrest as the probable cause of death. https://www.thatsmags.com/china/post/31100/student-deaths-lead-schools-to-adjust-rules-on-masks-while-exercising