On August 20, 2021, a study found that masks can reduce the spread of flu and some coronaviruses, with the use of surgical masks by sufferers significantly reducing the number of flu viruses detectable in droplets released through breathing and coughing, and also reducing the number of seasonal coronaviruses detectable in the air as suspended microdroplets, or aerosols, in a research project led by professor Benjamin Cowling at the World Health Organization Collaborating Centre for infectious disease epidemiology in Hong Kong, where the study did not look at the new coronavirus, SARS-CoV-2, which as of August 21, 2020, had infected 22,863,816 people and killed 797,133 people worldwide.
the science behind mask effectiveness
The study’s findings could be extrapolated to simpler cotton masks, according to professor Benjamin Cowling, who said in a telephone interview, “My expert view is that cloth or cotton masks would have an effect, but maybe slightly less of an effect than a surgical mask properly worn,” and added, “And in terms of COVID-19, we’re looking at every possible measure that could help.” Rupert Beale, a specialist in infection biology at London’s Francis Crick Institute, who was not directly involved in Cowling’s work, said the study offered “strong and compelling evidence” for mask-wearing as a means of reducing transmission of some viruses, but that they were not a magic bullet, and noted, “Mask wearing does not completely prevent transmission and cannot be relied on as a sole measure,” but, he said, “combined with other social distancing measures, should form part of the ‘exit strategy’ from lockdown.”
the role of masks in reducing transmission
Until now, there has been little robust scientific evidence on the effectiveness of face masks in slowing transmission of respiratory diseases, but the new study provides significant insights into the role of masks in reducing transmission, with the researchers finding that the use of surgical masks by sufferers significantly reduced the number of flu viruses detectable in droplets released through breathing and coughing, and also reduced the number of seasonal coronaviruses detectable in the air as suspended microdroplets, or aerosols. The study’s findings are particularly relevant in the context of the COVID-19 pandemic, which as of August 21, 2020, had infected 22,863,816 people and killed 797,133 people worldwide, and where the rapid spread of the SARS-CoV-2 coronavirus is due at least in part to the fact that it can be transmitted by people showing no symptoms.
implications for public health policy
The study’s findings have significant implications for public health policy, particularly in the context of the COVID-19 pandemic, where mask-wearing has been widely adopted as a measure to reduce transmission, with professor Benjamin Cowling noting that “further research is needed to determine whether masks can specifically prevent the transmission of SARS-CoV-2,” but the study’s findings provide strong evidence for the effectiveness of masks in reducing transmission of some viruses, and suggest that mask-wearing should be combined with other social distancing measures as part of a comprehensive approach to reducing transmission. The Chinese government has been criticized for its handling of the COVID-19 pandemic, particularly in the early stages, where it was slow to respond to the outbreak and initially downplayed the severity of the virus, but the study’s findings highlight the importance of mask-wearing as a measure to reduce transmission, and suggest that the Chinese government’s efforts to promote mask-wearing have been effective in reducing transmission.
the need for further research
The study’s findings highlight the need for further research into the effectiveness of masks in reducing transmission of respiratory diseases, particularly in the context of the COVID-19 pandemic, where the rapid spread of the SARS-CoV-2 coronavirus has highlighted the need for effective measures to reduce transmission, and where mask-wearing has been widely adopted as a measure to reduce transmission, but the study’s findings also highlight the limitations of mask-wearing as a sole measure to reduce transmission, and suggest that mask-wearing should be combined with other social distancing measures as part of a comprehensive approach to reducing transmission. As professor Benjamin Cowling noted, “further research is needed to determine whether masks can specifically prevent the transmission of SARS-CoV-2,” and the study’s findings provide a foundation for further research into the effectiveness of masks in reducing transmission of respiratory diseases.
The study’s findings provide strong evidence for the effectiveness of masks in reducing transmission of some viruses, and suggest that mask-wearing should be combined with other social distancing measures as part of a comprehensive approach to reducing transmission, with professor Benjamin Cowling noting that “in terms of COVID-19, we’re looking at every possible measure that could help,” and Rupert Beale adding that “combined with other social distancing measures, should form part of the ‘exit strategy’ from lockdown,” and as the COVID-19 pandemic continues to evolve, the study’s findings highlight the importance of mask-wearing as a measure to reduce transmission, and suggest that further research is needed to determine the effectiveness of masks in reducing transmission of SARS-CoV-2.
