A new study has found that more than half of people infected with the Omicron variant of COVID-19 were unaware they had it.
Undiagnosed infections could be the reason why the variant spread so rapidly, researchers from the L.A.-based Cedars-Sinai Medical Centre, who conducted the study published in the journal JAMA Network Open on Wednesday, said in a release.
The study’s participants initially included 2,479 employees and patients of the medical centre, who provided blood samples before and after the surge of the Omicron wave.
Researchers identified 210 people who tested positive for Omicron. All were asked to complete health questionnaires outlining their signs and symptoms to monitor their health statuses during the study’s period.
It was found that 56 per cent of the participants had no idea they were infected, out of which only ten per cent reported even experiencing recent symptoms. Forty-four per cent of the respondents reported being aware of having Omicron.
“We hope people will read these findings and think, ‘I was just at a gathering where someone tested positive,’ or, ‘I just started to feel a little under the weather. Maybe I should get a quick test,’” Susan Cheng, co-author of the study, said in a release.
“The better we understand our own risks, the better we will be at protecting the health of the public as well as ourselves.”
The results from the study back up the vast underreporting of Omicron cases in Canada, found by a group of volunteer experts that have been analyzing the country’s cases since Dec. 2, 2021.
According to the researchers, additional research with bigger samples of people from other ethnic groups and localities will be required to determine the precise characteristics that are connected to a lack of infection awareness.
The data also revealed that with the widespread availability of at-home rapid test kits, people's awareness of their infection status improved.
“Awareness will be key for allowing us to move beyond this pandemic,” Cheng said.
Police say one former and one current employee of Air Canada are among the nine suspects that are facing charges in connection with the gold heist at Pearson International Airport last year.
Drivers in Eastern Canada face a big increase in gas prices because of various factors, especially the higher cost of the summer blend, industry analysts say.
Toronto Raptors player Jontay Porter has been handed a lifetime ban from The National Basketball Association (NBA) following an investigation which found he disclosed confidential information to sports bettors, the league says.
The RCMP confirmed Wednesday it had executed a search warrant at an address registered to GC Strategies. This development comes as MPs are enacting an extraordinary, rarely used parliamentary power, summoning one of its contractors to appear before the House of Commons to be admonished publicly for failing to answer questions related to the ArriveCan app.
Advocacy groups across Canada are expressing widespread disappointment about the amount of funding earmarked in the 2024 federal budget for the long-awaited Canada Disability Benefit.
An earthquake with a preliminary magnitude of 6.4 hit southern Japan late on Wednesday, said the Japan Meteorological Agency, without issuing a tsunami warning.
A Hail Mary rehash of the greatest hits from the Trudeau government’s three-week travelling pony-show, the 2024 federal budget takes aim at reversing the party’s popularity plunge in the under-40 set, writes political columnist Don Martin. But will it work before the next election?
More than 5,500 years ago, two women were tied up and probably buried alive in a ritual sacrifice, using a form of torture associated today with the Italian Mafia, according to an analysis of skeletons discovered at an archeological site in southwest France.
A new Lennon and McCartney collaboration is the last thing anybody expected.
Video of the moment a suspect left Toronto Pearson International Airport with more than $22 million in gold and cash has been released by police.
Drivers in Eastern Canada face a big increase in gas prices because of various factors, especially the higher cost of the summer blend, industry analysts say.
Progress has been made on a new compensation model for family doctors, with the Alberta Medical Association (AMA) hopeful for a fall rollout.
Ontario is going to see a big jump at the pumps later this week as gas prices in the province hit levels not seen in nearly two years, according to one industry analyst.
A former massage therapist who pleaded guilty to a string of sexual assaults has had his day parole revoked.
A former Montreal resident was sentenced earlier this week to 10 years in a United States federal prison for a multi-decade fraud that manipulated more than one million Americans into sending money to fake psychics.
The sound of a vehicle backfiring spooked a circus elephant while she was getting a pre-show bath in Butte, Montana, leading the pachyderm to break through a fence and take a brief walk, stopping noontime traffic on the city's busiest street before being loaded back into a trailer.
The U.S. Senate began its showdown over the articles of impeachment against Homeland Security Secretary Alejandro Mayorkas on Wednesday as Democrats are expected to move quickly to dismiss the articles, while Republicans insist there must be a full trial.
An earthquake with a preliminary magnitude of 6.4 hit southern Japan late on Wednesday, said the Japan Meteorological Agency, without issuing a tsunami warning.
Uber is helping investigators lookin into the account that sent a driver to the Ohio home where an 81-year-old man allegedly shot the woman to death because he erroneously believed she was part of a scam, the ride-hailing company said Wednesday.
An investigation of the catastrophic Maui wildfires that killed 101 people, destroyed hundreds of homes and left US$6 billion in damages reveals a spate of problems with emergency preparation and coordination before and during the disaster.
Russian forces are being withdrawn from Azerbaijan's Karabakh region, where they have been stationed as peacekeepers since the end of a war in 2020, officials of both countries said Wednesday.
The RCMP confirmed Wednesday it had executed a search warrant at an address registered to GC Strategies. This development comes as MPs are enacting an extraordinary, rarely used parliamentary power, summoning one of its contractors to appear before the House of Commons to be admonished publicly for failing to answer questions related to the ArriveCan app.
Advocacy groups across Canada are expressing widespread disappointment about the amount of funding earmarked in the 2024 federal budget for the long-awaited Canada Disability Benefit.
Prime Minister Justin Trudeau is accusing the Conservatives of siding with “multi-millionaires” and standing against fairness over their decision not to support the federal budget.
Progress has been made on a new compensation model for family doctors, with the Alberta Medical Association (AMA) hopeful for a fall rollout.
Public Health Ontario workers say the potential closure of six laboratories across the province would be dangerous and increase inequity in northern Ontario.
British Columbia’s decriminalization pilot project has been a key topic of discussion at various levels of government in recent weeks, with the conversation re-igniting after comments about diversion by a high-ranking officer of the Vancouver Police Department.
More than 5,500 years ago, two women were tied up and probably buried alive in a ritual sacrifice, using a form of torture associated today with the Italian Mafia, according to an analysis of skeletons discovered at an archeological site in southwest France.
There are a lot of risks when it comes to adolescents using screens — and a new multinational study shows weight-related bullying may be among them.
An experimental error led a team of scientists researching bumblebees to make a startling discovery: the insects’ remarkable ability to survive underwater for up to a week.
The Sundance Film Festival may not always call Park City, Utah, home. The Sundance Institute has started to explore the possibility of other U.S. locations to host the independent film festival starting in 2027, the organization said Wednesday.
A new Lennon and McCartney collaboration is the last thing anybody expected.
Disneyland employees who perform as many of the theme park’s beloved characters have filed to have a vote on whether to join the Actors’ Equity Association, which represents live performers all over the country, from actors on Broadway to strippers in Los Angeles.
Disneyland employees who perform as many of the theme park’s beloved characters have filed to have a vote on whether to join the Actors’ Equity Association, which represents live performers all over the country, from actors on Broadway to strippers in Los Angeles.
Boeing was the subject of dual Senate hearings Wednesday as Congress examined allegations of major safety failures at the embattled aircraft manufacturer, which has been pushed into crisis mode since a door-plug panel blew off a 737 Max jetliner during an Alaska Airlines flight in January.
Drivers in Eastern Canada face a big increase in gas prices because of various factors, especially the higher cost of the summer blend, industry analysts say.
In Salman Rushdie's first book since the 2022 stabbing that hospitalized him and left him blind in one eye, the author wastes no time reliving the day he thought might be his last.
A Celebrity Apex cruise to the Caribbean this month turned into a rocking Newfoundland kitchen party when hundreds of people from Canada's easternmost province happened to be booked on the same ship.
The one thing 9-year-old Cal Clifford wanted more than anything since he was a toddler was a pet octopus.
Former football star and celebrity criminal defendant O.J. Simpson was cremated Wednesday, the lawyer handling his estate said following his death last week at home in Las Vegas at age 76.
Toronto Raptors player Jontay Porter has been handed a lifetime ban from The National Basketball Association (NBA) following an investigation which found he disclosed confidential information to sports bettors, the league says.
The federal government's move to reduce its office space by 50 per cent over the next 10 years could open up discussions on a potential site for a new Ottawa Senators arena in downtown Ottawa, according to Mayor Mark Sutcliffe.
Tesla will ask shareholders to reinstate a US$55 billion compensation package for CEO Elon Musk that was rejected by a judge in Delaware this year and to move the electric car maker's corporate home from Delaware to Texas.
Tesla has hit a series of roadblocks, including increased competition and declining sales. The company announced Monday it is slashing 10 per cent of its global workforce.
A driver from London will have to find alternative transportation after an OPP officer clocked them travelling nearly 200 km/h on Highway 401 over the weekend.
When Les Robertson was walking home from the gym in North Vancouver's Lower Lonsdale neighbourhood three weeks ago, he did a double take. Standing near a burrow it had dug in a vacant lot near East 1st Street and St. Georges Avenue was a yellow-bellied marmot.
A moulting seal who was relocated after drawing daily crowds of onlookers in Greater Victoria has made a surprise return, after what officials described as an 'astonishing' six-day journey.
Just steps from Parliament Hill is a barber shop that for the last 100 years has catered to everyone from prime ministers to tourists.
A high score on a Foo Fighters pinball machine has Edmonton player Dave Formenti on a high.
A compound used to treat sour gas that's been linked to fertility issues in cattle has been found throughout groundwater in the Prairies, according to a new study.
While many people choose to keep their medical appointments private, four longtime friends decided to undergo vasectomies as a group in B.C.'s Lower Mainland.
A popular highway in Alberta's Banff National Park now has a 'no stopping zone' to help protect two bears.
B.C. resident Robert Conrad spent thousands of hours on Crown land developing an unusual bond with deer.
A Sudbury woman said her husband was bringing the recycling out to the curb Wednesday night when he had to make a 'mad dash' inside after seeing a bear.
Transit users taking SkyTrain through Burnaby Wednesday were warned to expect service interruptions due to a medical emergency.
It's the time of year when many turn their attention to their yards and other green spaces, but unpredictable winters and dry summers have local gardeners scrambling.
A woman involved in a dog-bite incident on the North Shore last month has been identified, according to police.
Video of the moment a suspect left Toronto Pearson International Airport with more than $22 million in gold and cash has been released by police.
Toronto Raptors player Jontay Porter has been handed a lifetime ban from The National Basketball Association (NBA) following an investigation which found he disclosed confidential information to sports bettors, the league says.
Police say one former and one current employee of Air Canada are among the nine suspects that are facing charges in connection with the gold heist at Pearson International Airport last year.
Calgary has a new brand and it's looking up.
A Calgary doctor has been charged with fraud after allegedly submitting millions of dollars in false claims to the province.
The Calgary Canucks moved within one win of the Alberta Junior Hockey League (AJHL) championship Tuesday night, coming from behind to defeat the Whitecourt Wolverines 5-4.
Ottawa motorists are being warned to expect a big hike in gasoline prices this week, as prices rise to the highest level since August 2022.
Treasury Board President Anita Anand says no government ministry and agency will be left out of the process of cutting 5,000 public-service positions.
The federal government's move to reduce its office space by 50 per cent over the next 10 years could open up discussions on a potential site for a new Ottawa Senators arena in downtown Ottawa, according to Mayor Mark Sutcliffe.
Halfway between a family medicine group (GMF) and a hospital, the Quebec government on Wednesday clarified its model for private mini-hospitals that will focus on the needs of seniors.
A former Montreal resident was sentenced earlier this week to 10 years in a United States federal prison for a multi-decade fraud that manipulated more than one million Americans into sending money to fake psychics.
Quebec Liberal MP Pablo Rodriguez says he deplores the tone taken by the leader of the Parti Quebecois, who referenced dark moments in Canadian history to justify the party's push for independence.
Progress has been made on a new compensation model for family doctors, with the Alberta Medical Association (AMA) hopeful for a fall rollout.
A wildfire in west-central Alberta that was sparked by a natural gas pipeline rupture Tuesday is under control.
Two semis rolled Wednesday morning in and around Edmonton.
The RCMP says it is investigating a sudden death in Nova Scotia’s Colchester County.
Nova Scotia is opening the first long-term care facility in a First Nations community in the province.
A Celebrity Apex cruise to the Caribbean this month turned into a rocking Newfoundland kitchen party when hundreds of people from Canada's easternmost province happened to be booked on the same ship.
Though spring may be here, parts of Manitoba are set to get a blast of winter weather this week.
A motion filed by the man accused of killing four Indigenous women in Winnipeg to have one of those murder charges quashed has been dismissed by the judge – weeks before the start of his trial.
Though Winnipeg is full of hardcore hockey lovers, there’s one man who says he’s the Winnipeg Jets biggest fan.
A 36-year-old man who was an inmate at the Regina Correctional Centre (RCC) was found dead on Tuesday morning, a news release from the province said.
Tuesday night in government committee saw the Ministry of Social Services release documents revealing how much funding was sent to two Regina motels associated with Sask. Party MLA Gary Grewal.
A former massage therapist who pleaded guilty to a string of sexual assaults has had his day parole revoked.
The Waterloo Region Police Services Board wants to explore new ways of dealing with an annual unsanctioned St. Patrick’s Day street party in Waterloo’s University District.
Police say one former and one current employee of Air Canada are among the nine suspects that are facing charges in connection with the gold heist at Pearson International Airport last year.
A Toronto man is facing weapons and other charges after allegedly pulling out a hammer to avoid paying a bar tab in Guelph.
A former massage therapist who pleaded guilty to a string of sexual assaults has had his day parole revoked.
A man who Prince Albert police say shot at an opposing vehicle he was involved in a collision with last fall before fleeing the scene has been charged with attempted murder.
Motorists in Saskatoon are advised to drive cautiously, with roads wet and slushy following a night of rain and now.
The body of a missing man has been found after his vehicle was pulled into a northern creek on Saturday morning, Ontario Provincial Police say.
Police in Sault Ste. Marie charged a 26-year-old woman with several offences following an incident Monday morning.
Police say one former and one current employee of Air Canada are among the nine suspects that are facing charges in connection with the gold heist at Pearson International Airport last year.
It’s not every day that a new washroom becomes the talk of the town. But in the Lake Huron tourist community of Grand Bend a new so-called smart washroom has many residents and business owners flush with joy.
The latest musical production at the Grand Theatre in London, Ont. brings four rock and roll legends together for a dynamic jam session.
It’s an issue affecting local high schools across the Thames Valley District School Board (TVDSB) and the London District Catholic School Board (LDCSB).
One person was taken to the hospital after their vehicle rolled into a drainage creek off Highway 400 in Barrie.
Police advise vehicle owners to be cautious about selling privately after a recent incident where the seller did everything right when faced with a scammer.
Coyotes are no strangers to neighbourhoods in Barrie, with more sightings and encounters reported all the time.
Windsor police have issued an arrest warrant for a 24-year-old man related to an alleged sexual assault of a minor.
Environment Canada has issued a severe thunderstorm warning for Windsor-Essex.
Juliana Pannunzio, 20, was killed on Jan. 19, 2021 at a house party in Fort Erie, Ont.
Construction workers are poised to start building a BC Cancer centre in Nanaimo in 2025 – bringing access to critical treatment services closer to home for thousands of people on Vancouver Island.
Police in Metro Vancouver say their investigation into how a vehicle ended up at the bottom of the Fraser River has led to the discovery of other submerged vehicles, including a school bus and at least two stolen cars.
As the federal government unveiled a housing-heavy deficit budget, B.C.’s premier isn’t just ready to cash the cheque for his province’s share, he’s seemingly taunting his counterparts about their reluctance.
British Columbia is planning to add 240 new units to its complex-care housing program, providing homes for people with mental-health and addictions challenges that overlap with other serious conditions.
More than 80 residents from a low-income apartment building in Kelowna, B.C., have learned they won't be able to return to their homes for at least another two weeks.
Mounties are investigating a reported "road rage" incident in Kelowna, B.C., that left two men injured last week.
Lethbridge police have arrested a Vermilion, Alta., man in connection with a 'grandparent scam' that took aim at a local senior.
A serious multi-vehicle crash closed a highway north of Coaldale, Alta., on Wednesday morning.
With or without federal support, improvements to a major southern Alberta highway continue because of its critical economic importance as an east-west corridor, the province says.
For the next several months, the City of Sault Ste. Marie will be cracking down on people who improperly use accessible parking spaces.
A suspect riding a bicycle on Gibbs Street in Sault Ste. Marie this week has been charged with assaulting police, along with drug-related offences.
Police in Sault Ste. Marie charged a 26-year-old woman with several offences following an incident Monday morning.
A Celebrity Apex cruise to the Caribbean this month turned into a rocking Newfoundland kitchen party when hundreds of people from Canada's easternmost province happened to be booked on the same ship.
A pricing agreement has been reached between crab fishers and seafood processors that will allow for Newfoundland and Labrador's annual crab fishery to get started.
Longliners across Newfoundland and Labrador are tied up once again, as a new protest by the province's fish harvesters threatens to derail the crab fishery for a second straight year.
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