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Indian Institute of Science
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Ag/Zn nanoparticle
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nanofibrous polymer membrane
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Issued a patent (US 9,686,997 B2); No virus test data released
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Indian Institute of Science website (https://covid19.iisc.ac.in/)
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Indian Institute of Technology
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inorganic antiviral or antibacterial nanoparticles as well as organic antiviral and antibacterial molecules
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nanofibrous polymer membrane
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No virus test data released
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eGov magazine website (https://egov.eletsonline.com/2020/04/dst-supports-development-of-reusable-n95-n99-mask-with-enhanced-antiviral-efficiency/)
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Viroblock SA, Switzerland
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A biphasic system. The first phase is composed of nonphospholipids. The second part is an aqueous phase containing a cyclodextrin derivative.
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Coating
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Masks comply with EN149 standard; 5 log antiviral performance; 99,999% protection from H1N1, H5N1 and human coronaviruses
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T. Pelet & J. Paterson, “A Novel Technology to Protect from Airborne Viruses”, Asia–Pacific Biotech News, 2013, 17.
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Hong Kong University of Science and Technology
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Undisclosed
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Coating
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99.99% protection from bacteria and viruses including rubella, avian influenza, H1N1 and FCV
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Hong Kong University of Science and Technology website
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University of Kentucky
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proteolytic enzymes
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Antivirus filter
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No virus test data released
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University of Kentucky website (https://uknow.uky.edu/research/uk-researchers-seek-develop-antiviral-membrane-mask)
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