Below are a few studies to fulfill your desire for evidence. Let me know when you have read them all.
) Effectiveness of Adding a Mask Recommendation to Other Public Health Measures to Prevent SARS-CoV-2 Infection in Danish Mask Wearers, Bundgaard, 2021
SARS-CoV-2 Transmission among Marine Recruits during Quarantine, Letizia, 2020
Physical interventions to interrupt or reduce the spread of respiratory viruses, Jefferson, 2020
The Impact of Community Masking on COVID-19: A Cluster-Randomized Trial in Bangladesh, Abaluck, 2021
Heneghan et al.
Evidence for Community Cloth Face Masking to Limit the Spread of SARS-CoV-2: A Critical Review, Liu/CATO, 2021
) Nonpharmaceutical Measures for Pandemic Influenza in Nonhealthcare Settings—Personal Protective and Environmental Measures, CDC/Xiao, 2020
CIDRAP: Masks-for-all for COVID-19 not based on sound data, Brosseau, 2020
Universal Masking in Hospitals in the Covid-19 Era, Klompas/NEJM, 2020
Masks for prevention of viral respiratory infections among health care workers and the public: PEER umbrella systematic review, Dugré, 2020
Effectiveness of personal protective measures in reducing pandemic influenza transmission: A systematic review and meta-analysis, Saunders-Hastings, 201
Experimental investigation of indoor aerosol dispersion and accumulation in the context of COVID-19: Effects of masks and ventilation, Shah, 2021
Exercise with facemask; Are we handling a devil’s sword?- A physiological hypothesis, Chandrasekaran, 2020
Surgical face masks in modern operating rooms–a costly and unnecessary ritual?, Mitchell, 1991
Facemask against viral respiratory infections among Hajj pilgrims: A challenging cluster-randomized trial, Alfelali, 2020
Simple respiratory protection–evaluation of the filtration performance of cloth masks and common fabric materials against 20-1000 nm size particles, Rengasamy, 2010
Respiratory performance offered by N95 respirators and surgical masks: human subject evaluation with NaCl aerosol representing bacterial and viral particle size range, Lee, 20
Aerosol penetration and leakage characteristics of masks used in the health care industry, Weber, 1993
Disposable surgical face masks for preventing surgical wound infection in clean surgery, Vincent, 2016
Disposable surgical face masks: a systematic review, Lipp, 2005
Comparison of the Filter Efficiency of Medical Nonwoven Fabrics against Three Different Microbe Aerosols, Shimasaki , 2018
The use of masks and respirators to preventtransmission of influenza: a systematic review of thescientific evidence21) The use of masks and respirators to prevent transmission of influenza: a systematic review of the scientific evidence, Bin-Reza, 2012
Facial protection for healthcare workers during pandemics: a scoping review, Godoy, 202
Assessment of Proficiency of N95 Mask Donning Among the General Public in Singapore, Yeung, 2020
Evaluating the efficacy of cloth facemasks in reducing particulate matter exposure, Shakya, 2017
Use of surgical face masks to reduce the incidence of the common cold among health care workers in Japan: a randomized controlled trial, Jacobs, 2009
N95 Respirators vs Medical Masks for Preventing Influenza Among Health Care Personnel, Radonovich, 2019
Does Universal Mask Wearing Decrease or Increase the Spread of COVID-19?, Watts up with that? 2020
Masking: A Careful Review of the Evidence, Alexander, 2021
Community and Close Contact Exposures Associated with COVID-19 Among Symptomatic Adults ≥18 Years in 11 Outpatient Health Care Facilities — United States, July 2020, Fisher, 2020
Impact of non-pharmaceutical interventions against COVID-19 in Europe: a quasi-experimental study, Hunter, 2020
Masking lack of evidence with politics, CEBM, Heneghan, 2020
Transmission of COVID-19 in 282 clusters in Catalonia, Spain: a cohort study, Marks, 2021
Non-pharmaceutical public health measures for mitigating the risk and impact of epidemic and pandemic influenza, WHO, 2020
The Strangely Unscientific Masking of America, Younes, 2020
Facemasks and similar barriers to prevent respiratory illness such as COVID-19: A rapid systematic review, Brainard, 2020
The Year of Disguises, Koops, 2020
Open Schools, Covid-19, and Child and Teacher Morbidity in Sweden, Ludvigsson, 2020
Double-Masking Benefits Are Limited, Japan Supercomputer Finds, Reidy, 2021
etc