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  • / Face coverings can cut risk of coronavirus spread

Face coverings can cut risk of coronavirus spread

CHARLES WOOD · June 05, 2020
Face coverings can cut risk of coronavirus spread

A range of face masks could all potentially help reduce Covid-19 transmission, a study shows.

The distance and direction travelled by air expelled when a person breathes or coughs when wearing different face coverings was measured by a team led by engineers at the University of Edinburgh, using a technique called Background Oriented Schlieren imaging.

Measurements were taken from people wearing different face coverings while standing or lying down, and from a manikin connected to a cough-simulating machine.

Researchers found that all face coverings without an outlet valve reduce the forward distance travelled by a deep breath out by at least 90 per cent.

Surgical masks and the tested hand-made masks were found to limit the forward flow of a breath out, but also generate far-reaching leakage jets to the side, behind, above and below. Heavy breathing and coughing, in particular, were shown to generate intense backward jets.

Only masks that form a tight seal with the face were found to prevent the escape of virus-laden fluid particles, the team says.

Researchers found that full-face shields worn without masks enabled the release of a strong downward jet.

https://www.ed.ac.uk/roslin/news-events/latest-news/face-coverings-can-cut-risk-of-coronavirus-spread

See Airospring’s latest development of our elastomeric Face Mask -Airox

https://airox.co.uk/products/airox-ax100-face-mask

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