COVID-19 update from August 10: here are the latest news on the coronavirus in British Columbia

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12:00 p.m. – US study shows fleeces and bandanas make bad masks

A Duke University study of 14 different masks used to prevent the spread of COVID-19 found that bandanas work poorly and fleeces on the neck make matters worse.

The study – an inexpensive measure of the effectiveness of face masks at filtering expelled droplets – was published in the American Association for the Advancement of Science online magazine on Friday.

The researchers designed a simple test using a black box, infrared light, and a cell phone to measure the amount of droplets that pass through a particular mask when a person speaks.

The 14 masks tested included a fitted N95 respirator, an N95 valve respirator, surgical masks, several types of cotton masks, a poly / cotton blend mask, a knitted mask, a bandana and a fleece.

The results showed that no droplets entered the fitted N95 respirator. The surgical mask was the second best. Cotton masks worked to varying degrees with the N95 valve mask being among the best cotton masks.

Knitted masks did not perform well, but using a bandana was worse The fleece used as a mask was actually worse than no mask at all because the droplets were broken down by the fleece and spread out more .

12:00 p.m. – Care worker tests positive at Burnaby Home for the Aged

Fraser Health has confirmed that a staff member at a Burnaby long-term care home has tested positive for COVID-19.

The New Vista Care Center, a 236-bed residential facility that supports seniors with complex health issues and dementia, is on lockdown as Fraser Health’s rapid response team works to ” identify anyone who may have been exposed to the virus. Visits were canceled and movement of staff and residents within the facility was restricted.

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