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 draw for May’s Shop Local & Win contest takes place June 4, 2021. (Special to The News)
Open your wallet close to home and win

Maple Ridge - Pitt Meadows Chamber of Commerce hosts shop local competition

Brian Malfesi and his partner Vincent Jourdenais have qualified for the Tokyo Olympics. (Special to The News)
Maple Ridge kayak racer qualifies for Tokyo Olympics

Malfesi is first B.C. sprint paddler to race for Team Canada at Olympics in 33 years

Conservative Leader Erin O’Toole. (THE CANADIAN PRESS/Sean Kilpatrick)
Chamber of commerce for Maple Ridge and Pitt Meadows hosts Conservative leader

Erin O’Toole and MP Dalton part of online Zoom meeting on Monday

A photo of Telosky Stadium from the Maple Ridge Museum and Archives. (Special to The News)
Telosky Stadium opened in Haney on this day in 1950

Maple Ridge Museum and Archives marks special day in local sporting history

Transport 2050 is TransLink’s largest ever public engagement. (TransLink, Special to The News)
Last day to take TransLink’s planning survey

Maple Ridge and Pitt Meadows residents can have a say in Transport 2050

Daily confirmed COVID-19 cases reported to B.C. public health, seven-day rolling average in white, to May 12, 2021. (B.C. Centre for Disease Control)
B.C. preparing ‘Restart 2.0’ from COVID-19 as June approaches

Daily infections fall below 500 Friday, down to 387 in hospital

Bradley Priestap in an undated photo provided to the media some time in 2012 by the London Police Service.
Serial sex-offender acquitted of duct tape possession in B.C. provincial court

Ontario sex offender on long-term supervision order was found with one of many ‘rape kit’ items

Rich Coleman, who was responsible for the gaming file off and on from 2001 to 2013, was recalled after his initial testimony to the Cullen Commission last month. (Screenshot)
Coleman questioned over $460K transaction at River Rock during B.C. casinos inquiry

The longtime former Langley MLA was asked about 2011 interview on BC Almanac 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

Mandarin Garden in Abbotsford had two event tents set up for outdoor dining. One of the tents, valued at more than $5,000, was stolen early Friday morning (May 14). (Submitted photo)
UPDATE: Dining tent stolen from Abbotsford restaurant is located

Owner says it would have cost more than $5,000 to replace the rented event tent

Steven Shearer, <em>Untitled. </em>(Dennis Ha/Courtesy of Steven Shearer)
Vancouver photographer’s billboards taken down after complaints about being ‘disturbing’

‘Context is everything’ when it comes to understanding these images, says visual art professor Catherine Heard

Trina Hunt's remains were found in the Hope area on March 29. Her family is asking the public to think back to the weekend prior to when she went missing. (Photo courtesy of IHIT.)
Cousin of missing woman found in Hope says she won’t have closure until death is solved

Trina Hunt’s family urges Hope residents to check dashcam, photos to help find her killer

Chief Public Health Officer Theresa Tam listens to a question during a news conference, in Ottawa. THE CANADIAN PRESS/Adrian Wyld
Restrictions will lift once 75% of Canadians get 1 shot and 20% are fully immunized, feds say

Federal health officials are laying out their vision of what life could look like after most Canadians are vaccinated against COVID-19

Most Read