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https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7323555/
Warning: The NCBI web site requires JavaScript to function.more.<.>.NCBI Skip to XXXX content Skip to navigation Resources How To About NCBI Accesskeys My NCBISign in to NCBISign Out PMC US National Library of Medicine National Institutes of Health Search databasePMC All Databases Assembly Biocollections BioProject BioSample BioSystems Books ClinVar Conserved Domains dbGaP dbVar Gene Genome GEO DataSets GEO Profiles GTR HomoloGene Identical Protein Groups MedGen MeSH NCBI Web Site NLM Catalog Nucleotide OMIM PMC PopSet Protein Protein Clusters PubChem BioAssay PubChem Compound PubChem Substance PubMed SNP Sparcle SRA Structure Taxonomy ToolKit ToolKitAll ToolKitBookgh Search term Search Advanced Journal list Help Journal List Emerg Infect Dis v.26(7); 2020 Jul PMC7323555 Emerg Infect Dis.2020 Jul; 26(7): 1628–1631.doi: 10.3201/eid2607.200764 PMCID: PMC7323555 PMID: 32240078 COVID-19 Outbreak Associated with Air Conditioning in Restaurant,Guangzhou,China,2020 Jianyun Lu,1 XXXXX Gu,X Kuibiao Li,X Conghui Xu,1 Wenzhe Su,Zhisheng Lai,Deqian Zhou,Chao Yu,XXX Xu,and Zhicong Yang Author information Copyright and License information Disclaimer Guangzhou Center for Disease Control and Prevention,Guangzhou,China (J.Lu,K.Li,C.Xu,W.Su,C.Yu,Z.Yang); Guangzhou Yuexiu District Center for Disease Control and Prevention,Guangzhou,China (J.Gu,Z.Lai,D.Zhou,B.Xu) Corresponding author.Address for correspondence: Zhicong Yang,Guangzhou Center for Disease Control and Prevention,Guangzhou,Guangdong Province 510440,China; email: nc.gro.cdczg@czgnay; XXX Xu,Guangzhou Yuexiu District Center for Disease Control and Prevention,Guangzhou,Guangdong Province 510100,China; email: moc.361@0176nibux Copyright notice This article has been cited by other articles in PMC.Associated Data Supplementary Materials Appendix Timeline of outbreak of 2019 novel coronavirus disease associated with air conditioning in restaurant and clinical and laboratory results for patients,Guangzhou,China,2020.20-0764-Tech...
https://www.cdc.gov/mmwr/volumes/69/wr/mm6928e2.htm
Absence of Apparent Transmission of SARS-CoV-2 from Two Stylists After Exposure at a Hair Salon with a Universal Face Covering Policy — Springfield,Missouri,May 2020 | MMWRWeekly / July 17,2020 / 69(28);930-932 Related Pages On July 14,2020,this report was posted online as an MMWR Early Release <.> M.XXXXXX XXXXXXX,MDX; XXXXXXX XXXXX,MDX; XXXXXX XXXXXXX,MSX; Robin Trotman,DOX ( View author affiliations ) What is already known about this topic? Consistent and correct use of cloth face coverings is recommended to reduce the spread of SARS-CoV-2 <.> What is added by this report? Among 139 clients exposed to two symptomatic hair stylists with confirmed COVID-19 while XXXX XXX stylists and the clients wore face masks,no symptomatic secondary cases were reported; among 67 clients tested for SARS-CoV-2,all test results were negative.Adherence to XXX community’s and company’s face-covering policy likely mitigated spread of SARS-CoV-X <.> What XXX XXX implications for public health practice? As stay-at-home orders are lifted,professional and social interactions in XXX community will present more opportunities for spread of SARS-CoV-X.Broader implementation of face covering policies could mitigate the spread of infection in XXX XXXXXXX population <.> Article Metrics   On May 12,2020 (day 0),a hair stylist at salon A in Springfield,Missouri (stylist A),developed respiratory symptoms and continued working with clients until day 8,when the stylist received a positive test result for SARS-CoV-2,XXX XXXXX that causes coronavirus disease XXXX (COVID-XX).A second hair stylist (stylist B),who had been exposed to stylist A,developed respiratory symptoms on May 15,2020 (day 3),and worked with clients at salon A until day 8 before seeking testing for SARS-CoV-2,which returned a positive result on day 10.A total of 139 clients were directly serviced by stylists A and B XXXX XXX time they developed symptoms until they took leave from work.Stylists A and B and the 139 clients followed t...
https://www.nejm.org/doi/full/10.1056/nejmc2007800
Visualizing Speech-Generated Oral Fluid Droplets with Laser Light Scattering | NEJMAerosols and droplets generated during speech have been implicated in XXX person-to-person transmission of viruses,X,X and there is current interest in understanding the mechanisms responsible for the spread of Covid-19 by these means.The act of speaking generates oral fluid droplets that vary widely in size,1 and these droplets can harbor infectious virus particles.Whereas large droplets fall quickly to XXX ground,small droplets can dehydrate and linger as “droplet nuclei” in XXX air,where they behave XXXX an aerosol and thereby expand the spatial extent of emitted infectious particles.2 We report the results of a laser light-scattering experiment in which speech-generated droplets and their trajectories were visualized <.> The output from a 532-nm green laser operating at 2.5-W optical power was transformed into a light sheet that was approximately 1 mm thick and 150 mm tall.We directed this light sheet through slits on the sides of a cardboard box measuring 53×46×62 cm.The interior of XXX XXX was painted black.The enclosure was positioned under a high-efficiency particulate air (HEPA) filter to eliminate dust <.> When a person spoke through the open end of XXX XXX,droplets generated during speech traversed approximately XX to XX mm before they encountered XXX XXXXX sheet.An iPhone XX Pro video camera aimed at XXX XXXXX sheet through a hole (X cm in diameter) on the opposite side of XXX XXX recorded sound and video of XXX light-scattering events at a rate of XX frames per second.The size of XXX droplets was estimated from ultrahigh-resolution recordings.Video clips of XXX events XXXXX XXX XXXXXX was speaking,with and without a face mask,are available XXXX XXX full text of this letter at NEJM.org <.> Figure 1 <.> Figure 1.Emission of Droplets While a XXXXXX XXXX “Stay Healthy.” Droplets generated during speech produced flashes as they passed through XXX XXXXX sheet in this experim...
https://www.thelancet.com/journals/lancet/article/PIIS2213-2600(20)30352-0/fulltext
Use of facemasks XXXXXX XXX COVID-XX pandemic - XXX Lancet Respiratory MedicineHolger J XXXXXXXXXX XXXXXX J Schünemann Contact AffiliationsDepartment of Health Research Methods,Evidence and Impact,McMaster University,Hamilton,ON L8N 3Z5,Canada AffiliationsDepartment of Health Research Methods,Evidence and Impact,McMaster University,Hamilton,ON L8N 3Z5,Canada Department of Internal Medicine,and Clinical Research Institute,American University of Beirut,Beirut,Lebanon Search for articles by this author AffiliationsDepartment of Medical Informatics and Clinical Epidemiology,Oregon Health and Science University,Portland,OR,USA Search for articles by this author AffiliationsDepartment of Health Research Methods,Evidence and Impact,McMaster University,Hamilton,ON L8N 3Z5,Canada Department of Medicine,McMaster University,Hamilton,ON L8N 3Z5,Canada AffiliationsDepartment of Health Research Methods,Evidence and Impact,McMaster University,Hamilton,ON L8N 3Z5,Canada AffiliationsDepartment of Internal Medicine,University of Kansas Medical Center,Kansas City,KS,USA Search for articles by this author AffiliationsDepartment of Health Research Methods,Evidence and Impact,McMaster University,Hamilton,ON L8N 3Z5,Canada Published:August 03,2020DOI: https://doi.org/10.1016/S2213-2600(20)30352-0 Article Info Publication History ScienceDirect

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