The Science is Conclusive: Masks and Respirators do NOT Prevent Transmission of Viruses

Those young and healthy people who currently walk around with a mask on their faces would be better off wearing a helmet instead, because the risk of something falling on their head is greater than that of getting a serious case of Covid-19.

Prof. Dr. Beda M Stadler
Table of Contents

    Translate this page into your preferred language

    Masks, Undesirable Side Effects and Potential Hazards

    Is a Mask That Covers the Mouth and Nose Free from Undesirable Side Effects in Everyday Use and Free of Potential Hazards?

    Neither higher level institutions such as the WHO or the European Centre for Disease
    Prevention and Control (ECDC) nor national ones, such as the Centers for Disease Control
    and Prevention, GA, USA (CDC) or the German RKI, substantiate with sound scientific data
    a positive effect of masks in the public (in terms of a reduced rate of spread of COVID-19
    in the population)

    Abstract: Many countries introduced the requirement to wear masks in public spaces for containing SARS-CoV-2 making it commonplace in 2020. Up until now, there has been no comprehensive investigation as to the adverse health effects masks can cause. The aim was to find, test, evaluate and compile scientifically proven related side effects of wearing masks. For a quantitative evaluation, 44 mostly experimental studies were referenced, and for a substantive evaluation, 65 publications were found. The literature revealed relevant adverse effects of masks in numerous disciplines. In this paper, we refer to the psychological and physical deterioration as well as multiple symptoms described because of their consistent, recurrent and uniform presentation from different disciplines as a Mask-Induced Exhaustion Syndrome (MIES).We objectified evaluation evidenced changes in respiratory physiology of mask wearers with significant correlation of O2 drop and fatigue (p < 0.05), a clustered co-occurrence of respiratory impairment and O2 drop (67%), N95 mask and CO2 rise (82%), N95 mask and O2 drop (72%), N95 mask and headache (60%), respiratory impairment and temperature rise (88%), but also temperature rise and moisture (100%) under the masks. Extended mask-wearing by the general population could lead to relevant effects and consequences in many medical fields.

    Experimental Assessment of Carbon Dioxide Content in Inhaled Air With or Without Face Masks in Healthy Children A Randomized Clinical Trial

    JAMA Pediatr. Published online June 30, 2021. doi:10.1001/jamapediatrics.2021.2659

    Many governments have made nose and mouth covering or face masks compulsory for schoolchildren. The evidence base for this is weak.1,2 The question whether nose and mouth covering increases carbon dioxide in inhaled air is crucial. A large-scale survey3 in Germany of adverse effects in parents and children using data of 25 930 children has shown that 68% of the participating children had problems when wearing nose and mouth coverings.

    The normal content of carbon dioxide in the open is about 0.04% by volume (ie, 400 ppm). A level of 0.2% by volume or 2000 ppm is the limit for closed rooms according to the German Federal Environmental Office, and everything beyond this level is unacceptable.4

    Dr. Steven Gundry – A mask does not protect you from Virusses

    Dr. Steven R. Gundry is an American doctor and author. He is a former cardiac surgeon and currently runs his own clinic, investigating the impact of diet on health. Dr. Gundry conducted cardiac surgery research in the 1990s and was a pioneer in infant heart transplant surgery, and is a New York Times best-selling author of books such as The Plant Paradox: The Hidden Dangers in “Healthy” Foods That Cause Disease and Weight Gain.

    Full Interview on

    full interview:

    Face Masks Do Not Work Even In Hospitals!

    More Than a Dozen Credible Medical Studies Prove Face Masks Do Not Work Even In Hospitals!

    The medical literature for the past forty-five years has been consistent: masks are useless in preventing the spread of disease and, if anything, are unsanitary objects that themselves spread bacteria and viruses.

    The 20 U.S. states that have never ordered people to wear face masks indoors and out have dramatically lower COVID-19 death rates than the 30 states that have mandated masks.

    Most of the no-mask states have COVID-19 death rates below 20 per 100,000 population, and none have a death rate higher than 55.

    All 13 states that have death rates higher 55 are states that have required the wearing of masks in all public places. It has not protected them. Full article online

    Evidence Based Scientific Analysis of Why Masks are Ineffective, Unnecessary, and Harmful

    Jim Meehan, MD is an ophthalmologist and preventive medicine specialist with over 20 years of experience and advanced training in immunology, inflammation, and infectious disease.

    Advocates for mask mandates simply don’t have the highest-levels of scientific evidence to support their arguments. They can only cite low-level science – retrospective observational studies.

    Key Points

    • Decades of the highest-level scientific evidence (meta-analyses of multiple randomized controlled trials) overwhelmingly conclude that medical masks are ineffective at preventing the transmission of respiratory viruses, including SAR-CoV-2.
    • Those arguing for masks are relying on low-level evidence (observational retrospective trials and mechanistic theories), none of which are powered to counter the evidence, arguments, and risks of mask mandates.
    • The majority of the population is at very low to almost no risk of severe or lethal disease from CoVID-19. Children are at an extraordinarily low risk of dying from CoVID-19. Based on CDC published data, 99.99815% of children that contract CoVID-19 survive.
    • Transmission of SARS-CoV-2 among children in schools and daycares is very rare.
      Masks worn properly are well documented to cause harm to their wearers. Masks worn improperly, re-used, or contaminated are dangerous.
    • Any reasonable risk to benefit analysis of medical masks concludes that the risks overwhelmingly outweigh the benefits.
    • Children are at imminent risk of harm from mask mandates.

    Masks defeated the flu? 4 reasons that’s absurd beyond belief

    DANIEL HOROWITZ June 28, 2021

    The disappearance of flu-like illnesses occurred even at times and in places where mask-wearing was uncommon, and its subsequent re-emergence occurred even in places where mask-wearing was still in vogue.

    Here are four points to consider:
    1) How can masks work so spectacularly for the flu and RSV but fail so miserably for COVID? 
    2) Why did rhinovirus colds continue while coronavirus colds stopped?
    3) Disappearance of viruses coincided with circulation of COVID, not COVID response. 
    4) Flu disappeared in countries and regions that did not have widespread masking.

    Masking: A Careful Review of the Evidence

    The question about the utility of face coverings (which has taken on a talisman-like life) is now overwrought with steep politicization regardless of political affiliation (e.g. republican or liberal/democrat).

    Importantly, the evidence just is and was not there to support mask use for asymptomatic people to stop viral spread during a pandemic. While the evidence may seem conflicted, the evidence (including the peer-reviewed evidence) actually does not support its use and leans heavily toward masks having no significant impact in stopping spread of the Covid virus.

    Dr Vernon Coleman Proof That Face Masks Do More Harm Than Good 

    This short monograph contains conclusive proof that face masks do more harm than good, and being forced to wear them is a form of oppression designed to have adverse physical and psychological effects upon the wearers rather than having any protective value. 

    Masks and Mask Wearing: 100 Facts You Must Know 

    The CDC’s Mask Mandate Study: Debunked

    Below the main scientific shortcomings or analytical ambiguities in the CDC’s most recent MMWR report on mask mandates:

    1. The CDC’s main evidence, a regression study based on selected sites in ten states with masking mandates from March through October 2020, did not include the four-month period from November through February 2021 (which might have controlled for other possibly contributing factors such as sunlight and vitamin D) and did not appear to take into account the possible effects of such factors as school closures or changes in social distancing practices. We point out that during the period of March 22, 2020 to October 12, 2020 this is actually representative of the spring, summer and early fall seasons when outdoor activity increases. Of course, this leads to more exposure to sunlight with the attendant generation of active vitamin D metabolites, while at the same time there are marked reductions in confinement within enclosed spaces which would necessarily reduce the opportunities for transmission of disease. A more stringent approach to the analyses, including the use of all available data (i.e. not excluding a full 4-month period of time), might have led conceivably to a conclusion that there was in fact no significant effect of mask mandates on disease or case rates. And in concert with the CDC’s disclaimers noted above, the CDC indicated in their own report that the conclusions described in the study in favour of masking were, at best, only moderately reliable. 
    2. The CDC analyzed changes in hospitalizations, but did not compare infection, disease, or death rates between states with and without masking mandates. Available evidence of that nature suggests that the course of the pandemic was not affected by state masking mandates.
    3. The CDC used a least squares fit regression analysis (OLS) (using “x” as mask wearing and the dependent/outcome to the “y” variable which is the number of Covid cases) despite the fact that simple regression is not the optimal approach and, we believe, should be replaced with Orthogonal Distance Regression (ODR) which would yield more reliable findings. 
    4. Based on the reporting, it appears that the CDC’s regression analysis was based on data from limited sites within a state, and not the entire state. 
    5. The CDC report failed to address/discuss recent potent research data based on high-quality case-controlled analyses, as well as a high-quality Danish randomized controlled trial study published in the Annals of Internal Medicine which found no statistically or clinically significant impact of mask-use in regard to the rate of infection with SARS CoV-2, or a recent NEJM publication (prospective cohort CHARM study) where researchers studied SARS-CoV-2 transmission among Marine recruits at Parris Island (n=1,848) who volunteered, underwent a 2-week quarantine at home that was followed by a second 2-week quarantine in a closed college campus setting. The predominant finding was that despite the very strict and enforced quarantine, including 2 full weeks of supervised confinement and then enforced social distancing and masking protocols, the rate of transmission was not reduced and in fact seemed to be higher than expected, despite the strong experimental design and the rigor associated with carrying out the study.
    6. The CDC report does not address and contextualize substantial “real world” experience showing that adding mandates where there is already substantial mask wearing has little effect, and that mask mandates that were followed can be correlated with increased case counts (e.g. references 1234). This obviously may not be cause and effect, but the same criticism can be levied against correlations or regressions going in the opposite direction. 

    Do Masks Work? Viral immunologist Dr. Byram Bridle

    Testing the effect of 5 MASKS together

    Dr Lee Merrit

    Dr. Merritt speaks on masks, detrimental outcomes of lockdowns, and the psychological impact on children from COVID.

    “anyone who is purporting to prove scientifically that masks work is either being paid or being played. This just doesn’t work this way and the outcome of this (the mask mandates) is not going to be good.”

    “Dr. Merritt is a classically trained physician and obtained her medical degree from the University of Rochester School of Medicine and Dentistry. After graduation, she did her internship at the National Naval Medical Center in Bethesda Maryland in Internal Medicine and completed a residency in Orthopaedic Surgery at San Diego Naval Medical Center. She has spent additional years providing care to active duty marines in Iwakuni, Japan and Quantico, Virginia. She was awarded the Louis A. Goldstein Fellowship in Spinal Surgery at Rochester String Memorial Hospital– the only female to have done so. Her life long interest has been in wellness and in 2006 she completed the American Academy of Anti-aging and Integrative Medicine fellowship.”

    Dr. Russell Blaylock – Neither a cloth mask or N95 mask has any effect on transmission of the COVID-19 virus.

    Masks Are Ineffective

    Dr. Blaylock states that “a recent careful examination of the literature, in which 17 of the best studies were analyzed, concluded that, ‘None of the studies established a conclusive relationship between mask/respirator use and protection against influenza infection.’

    Keep in mind, no studies have been done to demonstrate that either a cloth mask or the N95 mask has any effect on transmission of the COVID-19 virus.

    Any recommendations, therefore, have to be based on studies of influenza virus transmission. And, as you have seen, there is no conclusive evidence of their efficiency in controlling flu virus transmission.”

    Indeed, on April 1, 2020, the New England Journal of Medicine published an article that concluded that “wearing a mask outside health care facilities offers little, if any, protection from infection.” The article went on to state that “ the chance of catching Covid-19 from a passing interaction in a public space is therefore minimal.”

    The article was authored by:

    Michael Klompas, M.D., M.P.H.,
    Charles A. Morris, M.D., M.P.H.,
    Julia Sinclair, M.B.A.,
    Madelyn Pearson, D.N.P., R.N.,
    and Erica S. Shenoy, M.D., Ph.D.

    Author Affiliations: From the Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute (M.K.), Brigham and Women’s Hospital (M.K., C.A.M., J.S., M.P.), Harvard Medical School (M.K., C.A.M., E.S.S.), and the Infection Control Unit and Division of Infectious Diseases, Massachusetts General Hospital (E.S.S.) — all in Boston.

    Dr. Blaylock: Face Masks Pose Serious Risks To The Healthy

    By Dr. Russell Blaylock, MD – May 13, 2020

    Researchers found that about a third of the workers developed headaches with use of the mask, most had preexisting headaches that were worsened by the mask wearing, and 60% required pain medications for relief. As to the cause of the headaches, while straps and pressure from the mask could be causative, the bulk of the evidence points toward hypoxia and/or hypercapnia as the cause. That is, a reduction in blood oxygenation (hypoxia) or an elevation in blood C02 (hypercapnia).

    Dr. Dennis Rancourt – Masks and respirators do not work. 

    Dr. Dennis Rancourt Ph.D from University of Toronto (1984), former professor of physics at the University of Ottawa.

    Masks and respirators do not work. There have been extensive randomized controlled trial (RCT) studies, and meta-analysis reviews of RCT studies, which all show that masks and respirators do not work to prevent respiratory influenza-like illnesses, or respiratory illnesses believed to be transmitted by droplets and aerosol particles. 

    Furthermore, the relevant known physics and biology, which I review, are such that masks and respirators should not work. It would be a paradox if masks and respirators worked, given what we know about viral respiratory diseases: The main transmission path is long-residence-time aerosol particles (< 2.5 μm), which are too fine to be blocked, and the minimum-infective-dose is smaller than one aerosol particle.

    The present paper about masks illustrates the degree to which governments, the mainstream media, and institutional propagandists can decide to operate in a science vacuum, or select only incomplete science that serves their interests. Such recklessness is also certainly the case with the current global lockdown of over 1 billion people, an unprecedented experiment in medical and political history.

    Cotton masks associated with higher risk of penetration microorganisms

    Conclusions: This study is the first RCT of cloth masks, and the results caution against the use of cloth masks. This is an important finding to inform occupational health and safety. Moisture retention, reuse of cloth masks and poor filtration may result in increased risk of infection. Further research is needed to inform the widespread use of cloth masks globally. However, as a precautionary measure, cloth masks should not be recommended for HCWs, particularly in high-risk situations, and guidelines need to be updated.

    A Group Of Parents Sent Their Kids’ Face Masks to A Lab for Analysis

    Gainesville, FL (June 16, 2021) – A group of parents in Gainesville, FL, concerned about potential harms from masks, submitted six face masks to a lab for analysis. The resulting report found that five masks were contaminated with bacteria, parasites, and fungi, including three with dangerous pathogenic and pneumonia-causing bacteria. No viruses were detected on the masks, although the test is capable of detecting viruses.

    The analysis detected the following 11 alarmingly dangerous pathogens on the masks:

    Streptococcus pneumoniae (pneumonia) 
    Mycobacterium tuberculosis (tuberculosis) 
    Neisseria meningitidis (meningitis, sepsis) 
    Acanthamoeba polyphaga (keratitis and granulomatous amebic encephalitis) 
    Acinetobacter baumanni (pneumonia, blood stream infections, meningitis, UTIs— resistant to antibiotics) 
    Escherichia coli (food poisoning)
    Borrelia burgdorferi (causes Lyme disease)
    Corynebacterium diphtheriae (diphtheria)
    Legionella pneumophila (Legionnaires’ disease) 
    Staphylococcus pyogenes serotype M3 (severe infections—high morbidity rates) 
    Staphylococcus aureus (meningitis, sepsis)

    Half of the masks were contaminated with one or more strains of pneumonia-causing bacteria. One-third were contaminated with one or more strains of meningitis-causing bacteria. One-third were contaminated with dangerous, antibiotic-resistant bacterial pathogens. In addition, less dangerous pathogens were identified, including pathogens that can cause fever, ulcers, acne, yeast infections, strep throat, periodontal disease, Rocky Mountain Spotted Fever, and more.

    The face masks studied were new or freshly-laundered before wearing and had been worn for 5 to 8 hours, most during in-person schooling by children aged 6 through 11. One was worn by an adult. A t-shirt worn by one of the children at school and unworn masks were tested as controls. No pathogens were found on the controls. Proteins found on the t-shirt, for example, are not pathogenic to humans and are commonly found in hair, skin, and soil.

    Effectiveness of Adding a Mask Recommendation to Other Public Health Measures

    To assess whether recommending surgical mask use outside the home reduces wearers’ risk for SARS-CoV-2 infection in a setting where masks were uncommon and not among recommended public health measures.

    Randomized controlled trial (DANMASK-19 [Danish Study to Assess Face Masks for the Protection Against COVID-19 Infection]). ( NCT04337541)

    Setting: Denmark, April and May 2020.

    Are Face Masks Effective? The Evidence.

    Swiss Policy Research (SPR) is a research and information project on geopolitical propaganda in Switzerland and the international media.

    An overview of the current evidence regarding the effectiveness of face masks.

    So far, most studies found little to no evidence for the effectiveness of cloth face masks in the general population, neither as personal protective equipment nor as a source control. Website Swiss Policy Research on Face Masks

    WHO, Fauci, US Surgeon General – Masks do not protect

    Facemasks in the COVID-19 era: A health hypothesis

    The existing scientific evidences challenge the safety and efficacy of wearing facemask as preventive intervention for COVID-19.

    The data suggest that both medical and non-medical facemasks are ineffective to block human-to-human transmission of viral and infectious disease such SARS-CoV-2 and COVID-19, supporting against the usage of facemasks.

    Wearing facemasks has been demonstrated to have substantial adverse physiological and psychological effects.

    These include hypoxia, hypercapnia, shortness of breath, increased acidity and toxicity, activation of fear and stress response, rise in stress hormones, immunosuppression, fatigue, headaches, decline in cognitive performance, predisposition for viral and infectious illnesses, chronic stress, anxiety and depression.

    Long-term consequences of wearing facemask can cause health deterioration, developing and progression of chronic diseases and premature death.

    Governments, policy makers and health organizations should utilize prosper and scientific evidence-based approach with respect to wearing facemasks, when the latter is considered as preventive intervention for public health.

    Dr. Blaylock: Face Masks Pose Serious Risks To The Healthy

    By wearing a mask, the exhaled viruses will not be able to escape and will concentrate in the nasal passages, enter the olfactory nerves and travel into the brain.

    Physician And Medical Journal Editor: Healthy People Should Not Wear Face Masks

    During the COVID-19 pandemic, public health experts began telling us to follow a number of disease mitigation strategies that sounded reasonably scientific, but actually had little or no support in the scientific literature. Community wearing of masks was one of the more dangerous recommendations from our confused public health experts.

    The Pandemic of Bad Science and Public Health Misinformation on Community Wearing of Masks

    Jim Meehan, MD

    Source: Physician and Medical Journal Editor: Healthy People Should Not Wear Face Masks

    Masks Are Neither Effective Nor Safe: A Summary Of The Science

    A review of the peer-reviewed medical literature examines impacts on human health, both immunological, as well as physiological.  The purpose of this paper is to examine data regarding the effectiveness of facemasks, as well as safety data.  The reason that both are examined in one paper is that for the general public as a whole, as well as for every individual, a risk-benefit analysis is necessary to guide decisions on if and when to wear a mask.

    In this meta-analysis, face masks were found to have no detectable effect against transmission of viral infections. (1)  It found: “Compared to no masks, there was no reduction of influenza-like illness cases or influenza for masks in the general population, nor in healthcare workers.” Full Story online

    Prof. Dolores Cahill masks & social distancing do not affect coronavirus transmission

    Prof. Dolores Cahill, immunologist, who has studied coronaviruses for years explains: once you’ve had the novel Coronavirus, you are immune; masks & social distancing do not affect coronavirus transmission; and how this lockdown was a mistake.

    Dell Bigtree interview with Prof. Dolores Cahill –

    European Centre for Disease Prevention and Control

    Face masks

    There is little evidence that wearing face masks (e.g. surgical-type) outside of healthcare settings during the influenza season or a pandemic offers effective protection or reduces transmission, and ECDC does not recommend their use.

    Are face masks effective in protecting against COVID-19?

    If you are infected, the use of surgical face masks may reduce the risk of you infecting other people. On the other hand there is no evidence that face masks will effectively prevent you from becoming infected with the virus. In fact, it is possible that the use of face masks may even increase the risk of infection due to a false sense of security and increased contact between hands, mouth and eyes while wearing them. The inappropriate use of masks also may increase the risk of infection.

    WHO – Non-pharmaceutical public health measures for mitigating the risk and impact of epidemic and pandemic influenza

    There is no evidence on the effectiveness of  travel adviceSurface and object cleaning — there is no evidence that this is effective in reducing transmission…

    Respiratory etiquette — there is no evidence that this is effective in reducing influenza transmission, there is mechanistic plausibility..

    Face Masks — Ten RCTs were included in the meta-analysis, and there was no evidence that face masks are effective in reducing transmission of laboratory-confirmed influenza…
    Search the pdf for “No Evidence” ** The above link has been moved on the WHO website

    New link:

    CDC – Nonpharmaceutical Measures for Pandemic Influenza

    Hand Hygiene: The effect of hand hygiene combined with face masks on laboratory-confirmed influenza was not statistically significant
    Respiratory Etiquette: We did not identify any published research on the effectiveness of respiratory etiquette in reducing the risk for laboratory-confirmed influenza 
    Face Masks: we found no significant reduction in influenza transmission with the use of face masks

    In this review, we did not find evidence to support a protective effect of personal protective measures or environmental measures in reducing influenza transmission.

    The relative size of Particles

    Masks in the field …

    President Macron – proper use
    Effectiveness of a mask

    COVID19 is a Pandemic of fear, fleeing in logic in which we restrict reality, resulting in destroying society and at the same time creating dangerous social mechanisms.