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Efficacy of antimicrobial and anti-viral coated air filters to prevent the spread of airborne pathogens

Watson, Rowan; Oldfield, Morwenna; Bryant, Jack A.; Riordan, Lily; Hill, Harriet J.; Watts, Julie A.; Alexander, Morgan R.; Cox, Michael J.; Stamataki, Zania; Scurr, David J.; de Cogan, Felicity


Rowan Watson

Morwenna Oldfield

Jack A. Bryant

Lily Riordan

Harriet J. Hill

Michael J. Cox

Zania Stamataki

Principal Research Fellow

Assistant Professor in Pharmaceutical Science of Biological Medicines


The COVID-19 pandemic has demonstrated the real need for mechanisms to control the spread of airborne respiratory pathogens. Thus, preventing the spread of disease from pathogens has come to the forefront of the public consciousness. This has brought an increasing demand for novel technologies to prioritise clean air. In this study we report on the efficacy of novel biocide treated filters and their antimicrobial activity against bacteria, fungi and viruses. The antimicrobial filters reported here are shown to kill pathogens, such as Candida albicans, Escherichia coli and MRSA in under 15 min and to destroy SARS-CoV-2 viral particles in under 30 s following contact with the filter. Through air flow rate testing, light microscopy and SEM, the filters are shown to maintain their structure and filtration function. Further to this, the filters are shown to be extremely durable and to maintain antimicrobial activity throughout the operational lifetime of the product. Lastly, the filters have been tested in field trials onboard the UK rail network, showing excellent efficacy in reducing the burden of microbial species colonising the air conditioning system.


Watson, R., Oldfield, M., Bryant, J. A., Riordan, L., Hill, H. J., Watts, J. A., …de Cogan, F. (2022). Efficacy of antimicrobial and anti-viral coated air filters to prevent the spread of airborne pathogens. Scientific Reports, 12(1), Article 2803.

Journal Article Type Article
Acceptance Date Jan 24, 2022
Online Publication Date Mar 9, 2022
Publication Date Mar 9, 2022
Deposit Date Mar 15, 2023
Publicly Available Date Mar 17, 2023
Journal Scientific Reports
Electronic ISSN 2045-2322
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 12
Issue 1
Article Number 2803
Keywords Multidisciplinary
Public URL
Publisher URL


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