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I start a thread with evidence against masks. Papers, reports etc.. This is not my work, I stole most of it from other posts, I just want to collect all the links. I will add more links from time to time.
1/x Aiello 2010 (RCT, N=1437, Community Setting) âNeither face mask use and hand hygiene nor face mask use alone was associated with a significant reduction in the rate of ILI (transmission).â https://pubmed.ncbi.nlm.nih.gov/20088690/
2/x Alfelali 2019 (RCT, N=7,687, Community Setting) âFacemask use does not prevent clinical or laboratory-confirmed viral respiratory infections among Hajj pilgrims.â
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3349234
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3349234
3/x Barasheed 2011 (RCT, N=164, Community Setting) âLab results did not show any difference between the two groupsâ https://pubmed.ncbi.nlm.nih.gov/25336079/
4/x Canini 2010 (RCT, N=306, Household Setting) âIn various sensitivity analyses, we did not identify any trend in the results suggesting effectiveness of facemasks.â https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2984432/
5/x Cowling 2008 (RCT, N=198, Household Setting) âThe laboratory-based or clinical secondary attack ratios did not significantly differ across the intervention arms.â https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2364646/
6/x Cowling 2009 (RCT, N=1201, Household Setting) âHand hygiene with or without facemasks seemed to reduce influenza transmission, but the differences compared with the control group were not significant.â https://pubmed.ncbi.nlm.nih.gov/19652172/
7/x Larson 2010 (RCT, N=509, Household Setting) âThere were no significant differences in rates of infection by intervention group.â https://pubmed.ncbi.nlm.nih.gov/20297744/
8/x Loeb 2009 (RCT, N=446, Healthcare Setting) âUse of a surgical mask compared with an N95 respirator resulted in noninferior rates of laboratory-confirmed influenza." https://pubmed.ncbi.nlm.nih.gov/19797474/
9/x MacIntyre 2009 (RCT, N=286, Household Setting) âIntent-to-treat analysis showed no significant difference in the relative risk of ILI in the mask use groups compared with the control group.â https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2662657/
10/x MacIntyre 2015 (RCT, N=1607, Healthcare Setting) âThis study is the first RCT of cloth masks, and the results caution against the use of cloth masksâŚwhich should not be recommended for HCWs.â https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4420971/
11/x MacIntyre 2011 (RCT, N=1441, Healthcare Setting) "There wereâno significant outcomesâ related to lab-confirmed influenza/viral infection transmissions found when comparing N95s and surgical masks in a hospital setting." https://pubmed.ncbi.nlm.nih.gov/21477136/
12/x MacIntyre 2016 (RCT, N=245, Healthcare Setting) âA post hoc comparison between the mask versus no-mask groups showed ⌠no protective effect against ILI and laboratory-confirmed viral respiratory infections.â https://pubmed.ncbi.nlm.nih.gov/28039289/
13/x Radonovich 2019 (RCT, N=2862, Healthcare Setting) âN95 respirators vs medical masks as worn by participants in this trial resulted in no significant difference in the incidence of laboratory-confirmed influenza.â https://pubmed.ncbi.nlm.nih.gov/31479137/
14/x Simmerman 2011 (RCT, N=1592, Household Setting) âInfluenza transmission was not reduced by interventions to promote hand washing and face mask use.â https://onlinelibrary.wiley.com/doi/full/10.1111/j.1750-2659.2011.00205.x
15/x Seuss 2012 (RCT, N=84, Household Setting) âThere was no statistically significant effect of the Mask and Mask/Handwashing interventions on secondary infections.â https://pubmed.ncbi.nlm.nih.gov/22280120/
16/x 1975: "The wearing of a surgical face mask had no effect upon the overall operating room environmental contamination" https://pubmed.ncbi.nlm.nih.gov/1157412/
17/x 1981: "No masks were worn in one operating theatre for 6 months. There was no increase in the incidence of wound infection."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2493952/pdf/annrcse01509-0009.pdf
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2493952/pdf/annrcse01509-0009.pdf
18/x 1989: "No infections were found in any patient, regardless of whether a cap or mask was used" https://onlinelibrary.wiley.com/doi/abs/10.1002/ccd.1810170306
19/x 1991: "It has never been shown that wearing surgical face masks decreases postoperative wound infections." https://link.springer.com/article/10.1007/BF01658736
20/x 2001: "Surgical face masks worn by patients during regional anaesthesia, did not reduce the concentration of airborne bacteria over the operation field in our study. Thus they are dispensable."
https://europepmc.org/article/med/11760479
https://europepmc.org/article/med/11760479
21/x 2001: "The evidence for discontinuing the use of surgical face masks would appear to be stronger than the evidence available to support their continued use"
https://journals.sagepub.com/doi/pdf/10.1177/0310057X0102900402
https://journals.sagepub.com/doi/pdf/10.1177/0310057X0102900402
22/x 2015: "overall there is a lack of substantial evidence to support claims that facemasks protect either patient or surgeon from infectious contamination."
https://journals.sagepub.com/doi/pdf/10.1177/0141076815583167
https://journals.sagepub.com/doi/pdf/10.1177/0141076815583167
23/x 2020: "We do not recommend requiring the general public who do not have symptoms of COVID... to routinely wear cloth or surgical masks because there is no scientific evidence they are effective in reducing the risk of SARS-CoV-2 transmission" https://www.cidrap.umn.edu/news-perspective/2020/04/commentary-masks-all-covid-19-not-based-sound-data
24/x Haâeri and Wiley, in 1980, applied human albumin microspheres to the interior of surgical masks in 20 operations. At the end of each operation, wound washings were examined under the microscope. âParticle contamination of the wound was demonstrated in all experiments.â
26/x Laslett and Sabin (1), in 1989, found that caps and masks were not necessary during cardiac catheterization. âNo infections were found in any patient, regardless of whether a cap or mask was used,â they wrote. Sjøl and Kelbaek (2) came to the same conclusion in 2002.
27/x
(1) https://onlinelibrary.wiley.com/doi/abs/10.1002/ccd.1810170306
(2) https://europepmc.org/article/med/11924291
(1) https://onlinelibrary.wiley.com/doi/abs/10.1002/ccd.1810170306
(2) https://europepmc.org/article/med/11924291
28/x After 1,537 operations performed with masks, the wound infection rate was 4.7%, while after 1,551 operations performed without masks, the wound infection rate was only 3.5%. 2/2
31/x A review by Skinner and Sutton in 2001 concluded that âThe evidence for discontinuing the use of surgical face masks would appear to be stronger than the evidence available to support their continued use.â https://journals.sagepub.com/doi/pdf/10.1177/0310057X0102900402
32/x Lahme et al., in 2001, wrote that âsurgical face masks worn by patients during regional anaesthesia, did not reduce the concentration of airborne bacteria over the operation field in our study. Thus they are dispensable.â https://europepmc.org/article/med/11760479
33/x Figueiredo et al., in 2001, reported that in five years of doing peritoneal dialysis without masks, rates of peritonitis in their unit were no different than rates in hospitals where masks were worn. http://www.advancesinpd.com/adv01/21Figueiredo.htm
34/x Bahli did a systematic literature review in 2009 and found that âno significant difference in the incidence of postoperative wound infection was observed between masks groups and groups operated with no masks.â https://www.semanticscholar.org/paper/Does-evidence-based-medicine-support-the-of-in-in-Bahli/751acd427c20c8dc7d1fbc1b45eead104286f481?p2df
35/x Surgeons at the Karolinska Institute in Sweden, recognizing the lack of evidence supporting the use of masks, ceased requiring them in 2010 for anesthesiologists and other non-scrubbed personnel in the operating room. 1/2
36/x âOur decision to no longer require routine surgical masks for personnel not scrubbed for surgery is a departure from common practice. But the evidence to support this practice does not exist,â wrote Dr. Eva Sellden. 2/2 https://pubs.asahq.org/anesthesiology/article/113/6/1447/9572/Is-Routine-Use-of-a-Face-Mask-Necessary-in-the
37/x Webster et al., in 2010, reported on obstetric, gynecological, general, orthopaedic, breast and urological surgeries performed on 827 patients. 1/2 https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1445-2197.2009.05200.x
38/x All non-scrubbed staff wore masks in half the surgeries, and none of the non-scrubbed staff wore masks in half the surgeries. Surgical site infections occurred in 11.5% of the Mask group, and in only 9.0% of the No Mask group.
39/x Lipp and Edwards(1) reviewed the surgical literature in 2014 and found âno statistically significant difference in infection rates between the masked and unmasked group in any of the trials.â Vincent and Edwards(2) updated this review in 2016 and the conclusion was the same.
40/x
(1) https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD002929.pub2/full
(2) https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD002929.pub3/full
(1) https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD002929.pub2/full
(2) https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD002929.pub3/full
41/x Carøe, in a 2014 review based on four studies and 6,006 patients, wrote that ânone of the four studies found a difference in the number of post-operative infections whether you used a surgical mask or not.â https://europepmc.org/article/med/25294675
42/x Salassa and Swiontkowski, in 2014, investigated the necessity of scrubs, masks and head coverings in the operating room and concluded that âthere is no evidence that these measures reduce the prevalence of surgical site infection.â https://journals.lww.com/jbjsjournal/Abstract/2014/09030/Surgical_Attire_and_the_Operating_Room__Role_in.11.aspx
43/x Da Zhou et al., reviewing the literature in 2015, concluded that âthere is a lack of substantial evidence to support claims that facemasks protect either patient or surgeon from infectious contamination.â https://journals.sagepub.com/doi/pdf/10.1177/0141076815583167
44/x Big German analysis about masks. "A mask duty gives a false sense of security, and a false sense of security is always a security risk." https://www.thieme-connect.com/products/ejournals/abstract/10.1055/a-1174-6591
45/x Fucked that up: https://twitter.com/Rapatauxx/status/1308826341014466560?s=20
U will find the paper here https://twitter.com/Rapatauxx/status/1308821960206540810?s=20
U will find the paper here https://twitter.com/Rapatauxx/status/1308821960206540810?s=20
46/x WHO, 2019, masks don't work... https://twitter.com/boriquagato/status/1310595825865756673
