Hand-Held Device Measures Aerosols for Coronavirus Risk Assessment

Understanding aerosol concentrations and persistence in public spaces can help determine infection risks. However, measuring these concentrations is difficult, requiring specialized personnel and equipment. Now, researchers demonstrate that a commercial hand-held particle counter can be used for this purpose and help determine the impacts of risk-reducing measures, like ventilation improvements. They describe the quick and easy, portable process in the journal Physics of Fluids.

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The Mask Matters: How Masks Affect Airflow, Protection Effectiveness

Even though it has been widely known that wearing a face mask will help mitigate the community spread of COVID-19, less is known regarding the specific effectiveness of masks in reducing the viral load in the respiratory tracts of those wearing them. In Physics of Fluids, researchers examined the effect of wearing a three-layer surgical mask on inspiratory airflows and the mask’s effects on the inhalation and deposition of ambient particles in the upper respiratory airways.

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Aerosol Microdroplets Inefficient Carriers Of COVID-19 Virus

Aerosol microdroplets do not appear to be extremely efficient at spreading the virus that leads to COVID-19. While the lingering microdroplets are certainly not risk-free, due to their small size they contain less virus than the larger droplets that are produced when someone coughs, speaks, or sneezes directly on us, said researchers at the University of Amsterdam’s Van der Waals-Zeeman Institute. The results were published in Physics of Fluids.

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Signatory to letter to WHO focused on understanding virus transmission by aerosols

On Monday, more than 230 scientists from around the world declared “It’s time to address airborne transmission of COVID-19.”In a letter signed by Washington University in St. Louis faculty and published in the journal Clinical Infectious Diseases, directed toward “Most public health organizations, including the World Health Organization,” the scientists urged that public health organizations need to make recommendations beyond hand washing and mask-wearing.

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