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Alsaadi HH, Aldwairi M, Yasin F, Cachinho SCP, Hussein A. Artificial intelligence tool for the study of COVID-19 microdroplet spread across the human diameter and airborne space. PLoS One 2023; 18:e0269905. [PMID: 37467202 DOI: 10.1371/journal.pone.0269905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 03/20/2023] [Indexed: 07/21/2023] Open
Abstract
The 2019 novel coronavirus (SARS-CoV-2 / COVID-19), with a point of origin in Wuhan, China, has spread rapidly all over the world. It turned into a raging pandemic wrecking havoc on health care facilities, world economy and affecting everyone's life to date. With every new variant, rate of transmission, spread of infections and the number of cases continues to rise at an international level and scale. There are limited reliable researches that study microdroplets spread and transmissions from human sneeze or cough in the airborne space. In this paper, we propose an intelligent technique to visualize, detect, measure the distance of spread in a real-world settings of microdroplet transmissions in airborne space, called "COVNET45". In this paper, we investigate the microdroplet transmission and validate the measurements accuracy compared to published researches, by examining several microscopic and visual images taken to investigate the novel coronavirus (SARS-CoV-2 / COVID-19). The ultimate contribution is to calculate the spread of the microdroplets, measure it precisely and provide a graphical presentation. Additionally, the work employs machine learning and five algorithms for image optimization, detection and measurement.
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Affiliation(s)
- Hesham H Alsaadi
- College of Technological Innovation, Zayed University, Abu Dhabi, UAE
| | - Monther Aldwairi
- College of Technological Innovation, Zayed University, Abu Dhabi, UAE
| | - Faten Yasin
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, United Kindom
| | - Sandra C P Cachinho
- Cell Sorting and Isolation Facility, Research Technology Building, University of Liverpool, Liverpool, United Kindom
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Shankar PR, Palaian S, Vannal V, Sreeramareddy CT. Non-Pharmacological Infection Prevention and Control Interventions in COVID-19: What Does the Current Evidence Say? Int J Prev Med 2021; 12:174. [PMID: 37663401 PMCID: PMC10472080 DOI: 10.4103/ijpvm.ijpvm_604_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 06/27/2021] [Indexed: 09/05/2023] Open
Abstract
Coronavirus disease-19 (COVID-19), a major global public health emergency has significantly impacted human health and livelihoods. The pandemic continues to spread and treatments and vaccines are at different stages of development. Mass vaccination has been rolled out worldwide. This review article provides a narrative summary of the evidence on various non-pharmacological interventions (NPIs) for COVID-19 containment. The authors reviewed the evidence published by the Norwegian Institute of Public Health map of COVID-19 evidence. Additional literature was identified from PubMed and Google Scholar, preprint sites, and news media. The search terms included "Social distancing measures" and "COVID 19", "Non-pharmacological interventions'' and "COVID 19", "COVID-19", "non-pharmacological interventions", "face mask", etc. The strength of the evidence for most studies on NPIs was 'weak to moderate' for restrictive NPIs. Ascertaining the impact of each NPI as a standalone intervention is difficult since NPIs are implemented simultaneously with other measures. Varying testing and reporting strategies across the countries and classification of deaths directly caused by COVID-19 create challenges in assessing the impact of restrictive NPIs on the case numbers and deaths. Evidence on hygiene measures such as face mask is more robust in design providing credible evidence on prevention of COVID-19 infection. Evidence from modeling studies, natural before-after studies, and anecdotal evidence from the strategies adopted by 'role model' countries suggests that continued use of NPIs is the only containment strategy until 'herd immunity' is achieved to reduce the severe disease and mortality.
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Affiliation(s)
- P. Ravi Shankar
- IMU Centre for Education, International Medical University, Kuala Lumpur, Malaysia
| | - Subish Palaian
- Department of Clinical Sciences, College of Pharmacy and Health Sciences, Ajman University, Ajman, United Arab Emirates
- Center of Medical and Bio-Allied Health Sciences, Research, Ajman University, Ajman, United Arab Emirates
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Siwal SS, Chaudhary G, Saini AK, Kaur H, Saini V, Mokhta SK, Chand R, Chandel UK, Christie G, Thakur VK. Key ingredients and recycling strategy of personal protective equipment (PPE): Towards sustainable solution for the COVID-19 like pandemics. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 2021; 9:106284. [PMID: 34485055 PMCID: PMC8404393 DOI: 10.1016/j.jece.2021.106284] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/26/2021] [Accepted: 08/25/2021] [Indexed: 05/24/2023]
Abstract
The COVID-19 pandemic has intensified the complications of plastic trash management and disposal. The current situation of living in fear of transmission of the COVID-19 virus has further transformed our behavioural models, such as regularly using personal protective equipment (PPE) kits and single-use applications for day to day needs etc. It has been estimated that with the passage of the coronavirus epidemic every month, there is expected use of 200 billion pieces of single-use facemasks and gloves. PPE are well established now as life-saving items for medicinal specialists to stay safe through the COVID-19 pandemic. Different processes such as glycolysis, hydrogenation, aminolysis, hydrolysis, pyrolysis, and gasification are now working on finding advanced technologies to transfer waste PPE into value-added products. Here, in this article, we have discussed the recycling strategies of PPE, important components (such as medical gloves, gowns, masks & respirators and other face and eye protection) and the raw materials used in PPE kits. Further, the value addition methods to recycling the PPE kits, chemical & apparatus used in recycling and recycling components into value-added products. Finally, the biorenewable materials in PPE for textiles components have been discussed along with concluded remarks.
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Affiliation(s)
- Samarjeet Singh Siwal
- Department of Chemistry, M.M. Engineering College, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, Haryana 133207, India
| | - Gauri Chaudhary
- Department of Chemistry, M.M. Engineering College, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, Haryana 133207, India
| | - Adesh Kumar Saini
- Department of Biotechnology, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, Haryana 133207, India
| | - Harjot Kaur
- Department of Chemistry, M.M. Engineering College, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, Haryana 133207, India
| | - Vipin Saini
- Department of Pharmacy, Maharishi Markandeshwar University, Kumarhatti, Solan, Himachal Pradesh, 173229, India
| | - Sudesh Kumar Mokhta
- Department of Environment, Science & Technology, Government of Himachal Pradesh, 171001, India
| | - Ramesh Chand
- Department of Health and Family Welfare, Government of Himachal Pradesh, 171001, India
| | - U K Chandel
- Department of surgery, Indira Gandhi Medical College and Hospital (IGMC), Shimla, Himachal Pradesh 171001, India
| | - Graham Christie
- Institute of Biotechnology, Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB2 1QT, UK
| | - Vijay Kumar Thakur
- Biorefining and Advanced Materials Research Center, SRUC, Kings Buildings, Edinburgh EH9 3JG, UK
- Enhanced Composites and Structures Center, School of Aerospace, Transport and Manufacturing, Cranfield University, Bedfordshire MK43 0AL, UK
- Faculty of Materials Science and Applied Chemistry Institute of Polymer Materials, Riga Technical University, P.Valdena 3/7, LV, 1048 Riga, Latvia
- Department of Mechanical Engineering, School of Engineering, Shiv Nadar University, Uttar Pradesh 201314, India
- School of Engineering, University of Petroleum & Energy Studies (UPES), Dehradun, Uttarakhand, India
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Watts S, Maniura-Weber K, Siqueira G, Salentinig S. Virus pH-Dependent Interactions with Cationically Modified Cellulose and Their Application in Water Filtration. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2100307. [PMID: 34146389 DOI: 10.1002/smll.202100307] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 05/22/2021] [Indexed: 06/12/2023]
Abstract
Norovirus and Rotavirus are among the pathogens causing a large number of disease outbreaks due to contaminated water. These viruses are nanoscale particles that are difficult to remove by common filtration approaches which are based on physical size exclusion, and require adsorption-based filtration methods. This study reports the pH-responsive interactions of viruses with cationic-modified nanocellulose and demonstrates a filter material that adsorbs nanoscale viruses and can be regenerated by changing the solution's pH. The bacteria viruses Qbeta and MS2, with diameters below 30 nm but different surface properties, are used to evaluate the pH-dependency of the interactions and the filtration process. Small angle X-ray scattering, cryogenic transmission electron microscopy, and ζ-potential measurements are used to study the interactions and analyze changes in their nanostructure and surface properties of the virus upon adsorption. The virus removal capacity of the cationic cellulose-based aerogel filter is 99.9% for MS2 and 93.6% for Qbeta, at pH = 7.0; and desorption of mostly intact viruses occurs at pH = 3.0. The results contribute to the fundamental understanding of pH-triggered virus-nanocellulose self-assembly and can guide the design of sustainable and environmentally friendly adsorption-based virus filter materials as well as phage and virus-based materials.
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Affiliation(s)
- Samuel Watts
- Biointerfaces Lab, Empa, Swiss Federal Laboratories for Material Science and Technology, Lerchenfeldstrasse 5, St. Gallen, 9014, Switzerland
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, Fribourg, 1700, Switzerland
| | - Katharina Maniura-Weber
- Biointerfaces Lab, Empa, Swiss Federal Laboratories for Material Science and Technology, Lerchenfeldstrasse 5, St. Gallen, 9014, Switzerland
| | - Gilberto Siqueira
- Cellulose and Wood Material Lab, Empa, Swiss Federal Laboratories for Material Science and Technology, Überlandstrasse 129, Dübendorf, 8600, Switzerland
| | - Stefan Salentinig
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, Fribourg, 1700, Switzerland
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Khan R, Kumar A, Kumar M, Jameel J. Solving The Problem of Fogged Eyewear in Orthopedic Surgeries in the COVID Scenario. Bull Emerg Trauma 2021; 9:46-47. [PMID: 33937426 PMCID: PMC8062894 DOI: 10.30476/beat.2021.86869.1171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Rizwan Khan
- Department of Orthopaedics, Hamdard Institute of Medical Sciences and Research, New Delhi, India
| | - Arvind Kumar
- Department of Orthopaedics, Hamdard Institute of Medical Sciences and Research, New Delhi, India
| | - Mukesh Kumar
- Department of Orthopaedics, Hamdard Institute of Medical Sciences and Research, New Delhi, India
| | - Javed Jameel
- Department of Orthopaedics, Hamdard Institute of Medical Sciences and Research, New Delhi, India
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Coroneo MT, Collignon PJ. SARS-CoV-2: eye protection might be the missing key. LANCET MICROBE 2021; 2:e173-e174. [PMID: 33655228 PMCID: PMC7906687 DOI: 10.1016/s2666-5247(21)00040-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Minas Theodore Coroneo
- Department of Ophthalmology, University of New South Wales at Prince of Wales Hospital, Randwick, NSW 2031, Australia
| | - Peter John Collignon
- Department of Infectious Diseases and Microbiology, Canberra Hospital, Garran, ACT, Australia.,Department of Infectious Disease, Medical School, Australian National University, Acton, ACT, Australia
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Kumar A, Qureshi OA, Arora R, Kumar S, Jameel J, Khan R. Comparison of three low-cost techniques to control fogging of sealed eyewear in a simulated operating room environment: A preliminary analysis. J Clin Orthop Trauma 2020; 11:S696-S699. [PMID: 32837102 PMCID: PMC7366969 DOI: 10.1016/j.jcot.2020.07.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/12/2020] [Accepted: 07/13/2020] [Indexed: 12/14/2022] Open
Abstract
PURPOSE In the current COVID pandemic, hermetically sealed eyewear is recommended for safe surgical practices to prevent eye contact with contaminated airborne particles or aerosols. These sealed eyewears definitely reduce the risk of contamination of eyes. However, there is a constant issue of fogging up of the inner surface that prevents good surgical visibility which can impair surgeons' performance and their ability to perform fine tasks, especially in operating rooms with temperature and humidity controlled as per the COVID guidelines. We investigated the effectiveness of surface-modified anti-fog polyethylene terephthalate(PET) films and the application of a detergent-based surfactant liquid, applied to the inner aspect of viewing frame, and addition of filtered vents in the prevention of fogging up of the protective eyewears in a simulated operating room environment. METHODS Ten volunteer orthopedic surgeons tested three modifications of a poly-hydrocarbon based hermetically sealed eyewear as a) application of a surface-modified anti-fog PET film on the inner aspect of eyewear, b) application of a detergent-based surfactant coating on the inner aspect of the protective eyewear, and c) addition of two filtered vents/holes on each side of the protective eyewear, covered with an N95 mask cutting. The testing was performed while completing a synthetic bone-based surgical task in a simulated operating room environment of 24-26° temperature and humidity between 40 and 70%, for a maximum of 2 h. The duration to the loss of clear visibility (ability to read a newspaper) and workable visibility (ability to perform the surgical task) was recorded for each volunteer. RESULTS The detergent-based surfactant provided the longest duration of clear visibility (69.3 ± 8.16 min) and the workable visibility was maintained for more than 2 h. The second best durations of clear visibility (31.9 ± 3.75 min) and workable visibility (41.6 ± 5.39 min) were provided by the surface-modified anti-fog PET film. The addition of the filtered vents provided only a marginal improvement in the visibility. CONCLUSION A detergent-based surfactant coating of the viewing surface provides a simple, inexpensive and effective solution to the problem of fogging of the protective eyewears. Besides this, the workable vision is maintained for a prolonged duration.
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Affiliation(s)
- Arvind Kumar
- Department of Orthopedics, Hamdard Institute of Medical Sciences and Research, New Delhi, 110062, India
| | - Owais Ahmed Qureshi
- Department of Orthopedics, Hamdard Institute of Medical Sciences and Research, New Delhi, 110062, India
| | - Rajesh Arora
- Department of Orthopedics, Hamdard Institute of Medical Sciences and Research, New Delhi, 110062, India
| | - Sandeep Kumar
- Department of Orthopedics, Hamdard Institute of Medical Sciences and Research, New Delhi, 110062, India
| | - Javed Jameel
- Department of Orthopedics, Hamdard Institute of Medical Sciences and Research, New Delhi, 110062, India
| | - Rizwan Khan
- Department of Orthopedics, Hamdard Institute of Medical Sciences and Research, New Delhi, 110062, India
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Abstract
Pandemics such as influenza, smallpox, and plague have caused the loss of hundreds of millions of lives and have occurred for many centuries. Fortunately, they have been largely eliminated by the use of vaccinations and drugs. More recently, Severe Acute Respiratory Syndrome (SARS), Middle East Respiratory Syndrome (MERS), and now Coronavirus Disease 2019 (COVID-19) have arisen, and given the current absence of highly effective approved vaccines or drugs, brute-force approaches involving physical barriers are being used to counter virus spread. A major basis for physical protection from respiratory infections is eye, nose, and mouth protection. However, eye protection with goggles is problematic due to "fogging", while nose/mouth protection is complicated by the breathing difficulties associated with non-valved respirators. Here, we give a brief review of the origins and development of face masks and eye protection to counter respiratory infections on the basis of experiments conducted 100 years ago, work that was presaged by the first use of personal protective equipment, "PPE", by the plague doctors of the 17th Century. The results of the review lead to two conclusions: first, that eye protection using filtered eye masks be used to prevent ocular transmission; second, that new, pre-filtered, valved respirators be used to even more effectively block viral transmission.
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Affiliation(s)
- Eric Oldfield
- Department of Chemistry, University of Illinois at
Urbana-Champaign, Urbana, Illinois 61801, United
States
| | - Satish R. Malwal
- Department of Chemistry, University of Illinois at
Urbana-Champaign, Urbana, Illinois 61801, United
States
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