Voters socially distance while waiting in line. (Curtis Compton/AP)

Voters socially distance while waiting in line. (Curtis Compton/AP)

6-feet rule virtually ineffective at preventing COVID spread indoors: MIT study

Researchers Martin Bazant and John Bush say, in most cases, exposure to the airborne virus is not prevented by social distancing

According to a new study from researchers at the Massachusetts Institute of Technology, staying six feet away from others does little to curb the spread of COVID-19 indoors.

Released Tuesday (April 27), “A Guideline to Limit Indoor Airborne Transmission of COVID-19” suggests virus-laden respiratory droplets emitted from an infected person pose more of an exposure risk than commonplace social distancing rules mitigate.

That’s according to mathematicians Martin Bazant and John Bush.

The duo generated a formula to simulate rooms where respiratory droplets expelled from an infected person wearing a mask were “well-mixed” or evenly spread throughout a room.

Depending on variables – including the size of the space, number of people, type of activity, whether masks are worn and ventilation or filtration measures – the risk of COVID-19 exposure was reduced or heightened.

In calmer environments with few people, the study found droplets carrying the virus fell to the ground faster than in high-activity rooms where particles stayed suspended in the air, longer.

READ MORE: Feds launch ad campaign urging social distancing, hygiene during COVID-19 crisis

“To minimize the risk of infection, one should avoid spending extended periods in highly populated areas,” concluded Bazant and Bush in the study.

“One is safer in rooms with large volume and high ventilation rates. One is at greater risk in rooms where people are exerting themselves in such a way as to increase their respiration rate and pathogen output, for example, by exercising, singing, or shouting.”

Overall, mask-wearing was found to be the best way to limit both short-range and overall airborne transmission of COVID-19, followed by sufficient ventilation and filtration.

Bazant and Bush also created a website allowing users to use their formula to determine for themselves how best to avoid catching COVID-19 indoors.

On it, the researchers stated, “while public health organizations are beginning to acknowledge airborne transmission, they have yet to provide a safety guideline that incorporates all the relevant variables.”

RELATED: 2-metre eagle wingspan signage reminds folks in B.C. city to practise social distancing



sarah.grochowski@bpdigital.ca

Like us on Facebook and follow us on Twitter.

Want to support local journalism? Make a donation here.

Coronavirus

Just Posted

The mighty Fraser during freshet on May 2, 2021 at Island 22 Regional Park. A new B.C. coalition representing 25 organizations, and 273,000 people, is calling on B.C. to reverse decades of wildlife and habitat declines. (Jennifer Feinberg/ The Chilliwack Progress)
Coalition calls on B.C. to invest in wildlife stewardship and habitat protection

Representing 25 organizations, and 273,000 people, they seek to reverse decades of declines

Terry Driver as he looked around the time of the killing of Tanya Smith and the attempted murder of Misty Cockerill in Abbotsford in October 1995. No current photos are available of Driver.
‘Abbotsford Killer’ Terry Driver denied parole, deemed ‘high risk’ to re-offend

Driver murdered Tanya Smith, 16, and seriously injured Misty Cockerill, 15, in 1995

Boats in the Fraser River launched from Barrowtown and Ft. Langley on May 12 to search for the missing fisherman. (Steve Simpson)
Boats search the Fraser River for missing Abbotsford fisherman

Anyone with ‘a boat, time, or a drone’ to help bring Damian Dutrisac home was asked to help

Mina Shahsavar is a fourth-year student in the bachelor of science in nursing program at University of the Fraser Valley and is an employed student nurse at Abbotsford Regional Hospital. (Submitted photo)
Nursing student in Abbotsford plans for career in critical care

Mina Shahsavar inspired during hospital stays as a child

The Canadian Forensic Health Corporation, made up of (left to right) Kirstin Simpson, Adrienne Fershau, Tiffany Kafka, Susan Short and Cole Bruce, are changing the game for the forensic nurse occupation. (Submitted)
Abbotsford nurses create Canadian Forensic Health Corporation

Tiffany Kafka, Susan Short, Kirstin Simpson, Cole Bruce and Adrienne Fershau teaching new generation

B.C. Labour Minister Harry Bains in the B.C. legislature, May 13, 2019. (Hansard TV)
VIDEO: B.C. to provide 3 days of sick pay for COVID-19 absences

Province will support employers on cost, labour minister says

A youth plays basketball in an otherwise quiet court in Toronto on Saturday April 17, 2021. The Canadian Civil Liberties Association is urging the federal and provincial governments to fight COVID-19 pandemic by focusing on proven public health policy interventions including paid sick leave, and education rather than punitive enforcement measures. THE CANADIAN PRESS/Chris Young
Provinces issued more COVID-19 tickets during 2nd wave: CCLA report

‘A pandemic is a public health, not a public order, crisis,’ reads the report

Capt. Arpit Mahajan of the Canadian Forces Snowbirds - Snowbirds 2 - shows off his ‘Jenn Book’ dedicated to Capt. Jennifer Casey. Zoom screenshot
Homecoming for B.C.-raised Snowbirds pilot training in the province

Capt. Arpit Mahajan flies Snowbird 2 in his first year as a solo pilot with the team

BC Housing minister David Eby. (THE CANADIAN PRESS/Chad Hipolito)
Eby jabs back against Penticton mayor’s ad urging BC Premier to intervene in shelter dispute

Eby writes that Penticton’s ‘serious’ social issues won’t improve under leadership of the mayor

What3words was first created in the U.K. in 2013 and is credited to saving the lives of outdoor enthusiasts around the world. (Contributed)
‘This is a life saving tool’: App helps paramedics find capsized canoeists near Revelstoke

What3words pinpoints the person’s phone location to a three-meter range

Provincial health officer Dr. Bonnie Henry updates B.C.’s COVID-19 situation at the B.C. legislature, April 29, 2021. (B.C. government)
B.C.’s COVID-19 rate creeps up again, 600 new cases Wednesday

One more death, 423 people in hospital with virus

B.C. Agriculture Minister Lana Popham takes questions in the B.C. legislature in 2017. (Hansard TV)
UPDATE: B.C. will fund another year of fresh fruit, vegetables, milk in schools

John Horgan government working on school meal program

Cannabis bought in British Columbia (Ashley Wadhwani/Black Press Media)
Is it time to start thinking about greener ways to package cannabis?

Packaging suppliers are still figuring eco-friendly and affordable packaging options that fit the mandates of Cannabis Regulations

Surrey RCMP is releasing sketches of a suspect in an “indecent act” at the Coyote Creek Elementary playground on April 30, 2021. Police said the suspect was clean-shaven “during some interactions” and on “other occasions had stubble outlining a goatee and mustache.” (Images: Surrey RCMP handout)

Most Read