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Canada needs a stronger COVID-19 detection system, experts say – CTV News

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3 years ago

April 21, 2022

Experts say Canada needs to develop a robust system to detect COVID-19 activity in the absence of wide-scale PCR testing.

Since the onset of the Omicron variant, provinces and territories have scaled back access to gold-standard PCR testing, citing the lack of capacity to keep up with demand and the need to free up health-care resources.

Many people have since relied on results from rapid antigen tests, but they aren’t as reliable at detecting the Omicron variant or reported and tracked the way PCR tests are. Experts say there needs to be a better way of informing people about COVID-19 activity in their communities.

Dr. Caroline Colijn, a mathematician and epidemiologist at Simon Fraser University, said there are currently “too many infections” in Canada to expand access to PCR tests to everyone to find out the true number of infections.

She said more robust programs could also be used to pick up other kinds of respiratory infections.

“And I suspect those are under development, but until they’re developed, deployed, and results are publicly available, people will have trouble finding out what their risks are in their social group, in their community and in their workplace,” she said.

“So then they’ll have trouble having the information needed to inform their own choices, their own workplace or community policies.”

Colijn said wastewater data is a really important source of information that can be publicly shared without compromising anyone’s private medical data and can help communities understand the prevalence of COVID-19. But like PCR and rapid tests, she said it has its limitations.

She noted there are numerous factors that could change wastewater signals, such as rainfall, temperature and different variants leaving different amounts of sequencing in the water, resulting in less accurate COVID-19 case estimates.

Colijn said she anticipates an integrated system that would incorporate wastewater data, along with PCR and rapid test results, in a way that’s designed to paint a more accurate picture of how much COVID-19 is in a population and inform people about the risk of contracting the virus.

“So we do need to think about how to get representative samples, and how to understand how many infections are out there,” she said.

Dr. Dan Gregson, an infectious disease physician and medical microbiologist at the University of Calgary, said it would be reasonable to expand PCR testing access to certain settings like schools and long-term care homes in the event of an outbreak so they can make a decision on whether to close those institutions to prevent further transmission.

However, he said the average person can rely on wastewater data to assess the risk of contracting COVID-19 in their community since it’s “much more cost-effective” and “tells us similar information” to PCR testing.

Dr. Peter Juni, scientific director of the Ontario COVID-19 Science Advisory Table, said it’s “likely not sustainable” to expand access to PCR testing to all symptomatic individuals again because of the high cost of the tests.

Juni noted that when PCR testing was available to all residents in Ontario, only somewhere between 30 and 45 per cent of infections were being detected because not everyone with the virus was getting tested. Some may have been asymptomatic, while others may not have had time to get tested., and still others may not have been getting tested early enough.

As for rapid antigen tests available in Canada, he said they have shown “lower test performance” when it comes to detecting the Omicron variant.

What’s needed is a COVID-19 detection system that can use a random sample in a population “to try to understand what’s actually happening and which can be ramped up if needed,” Juni said.

“If we see in wastewater, for instance, that infections start to increase, (then) we actually can really activate the system or extend it a bit, but it will be just a surveillance system that gives us enough situational awareness.”

This report by The Canadian Press was first published April 21, 2022.

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This story was produced with the financial assistance of the Meta and Canadian Press News Fellowship.

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Allen nets shutout as Devils burn Oilers 3-0

Published

4 hours ago

November 4, 2024

Anne Joseph

EDMONTON – Jake Allen made 31 saves for his second shutout of the season and 26th of his career as the New Jersey Devils closed out their Western Canadian road trip with a 3-0 victory over the Edmonton Oilers on Monday.

Jesper Bratt had a goal and an assist and Stefan Noesen and Timo Meier also scored for the Devils (8-5-2) who have won three of their last four on the heels on a four-game losing skid.

The Oilers (6-6-1) had their modest two-game winning streak snapped.

Calvin Pickard made 13 stops between the pipes for Edmonton.

TAKEAWAYS

Devils: In addition to his goal, Bratt picked up his 12th assist of the young season to give him nine points in his last eight games and now 15 points overall. Nico Hischier remains in the team lead, picking up an assist of his own to give him 16 points for the campaign. He has a point in all but four games this season.

Oilers: Forward Leon Draisaitl was held pointless after recording six points in his previous two games and nine points in his previous four. Draisaitl usually has strong showings against the Devils, coming into the contest with an eight-game point streak against New Jersey and 11 goals in 17 games.

KEY MOMENT

New Jersey took a 2-0 lead on the power play with 3:26 remaining in the second period as Hischier made a nice feed into the slot to Bratt, who wired his third of the season past Pickard.

KEY RETURN?

Oilers star forward and captain Connor McDavid took part in the optional morning skate for the Oilers, leading to hopes that he may be back sooner rather than later. McDavid has been expected to be out for two to three weeks with an ankle injury suffered during the first shift of last Monday’s loss in Columbus.

OILERS DEAL FOR D-MAN

The Oilers have acquired defenceman Ronnie Attard from the Philadelphia Flyers in exchange for defenceman Ben Gleason.

The 6-foot-3 Attard has spent the past three season in the Flyers organization seeing action in 29 career games. The 25-year-old right-shot defender and Western Michigan University grad was originally selected by Philadelphia in the third round of the 2019 NHL Entry Draft. Attard will report to the Oilers’ AHL affiliate in Bakersfield.

UP NEXT

Devils: Host the Montreal Canadiens on Thursday.

Oilers: Host the Vegas Golden Knights on Wednesday.

This report by The Canadian Press was first published Nov. 4, 2024.

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Mahomes throws 3 TD passes, unbeaten Chiefs beat Buccaneers 30-24 in OT

Published

5 hours ago

November 4, 2024

Anne Joseph

KANSAS CITY, Mo. (AP) — Patrick Mahomes threw for 291 yards and three touchdowns, and Kareem Hunt pounded into the end zone from two yards out in overtime to give the unbeaten Kansas City Chiefs a 30-24 win over the Tampa Bay Buccaneers on Monday night.

DeAndre Hopkins had two touchdown receptions for the Chiefs (8-0), who drove through the rain for two fourth-quarter scores to take a 24-17 lead with 4:17 left. But then Kansas City watched as Baker Mayfield led the Bucs the other way in the final minute, hitting Ryan Miller in the end zone with 27 seconds to go in regulation time.

Tampa Bay (4-5) elected to kick the extra point and force overtime, rather than go for a two-point conversion and the win. And it cost the Buccaneers when Mayfield called tails and the coin flip was heads. Mahomes and the Chiefs took the ball, he was 5-for-5 passing on their drive in overtime, and Hunt finished his 106-yard rushing day with the deciding TD plunge.

Travis Kelce had 14 catches for 100 yards with girlfriend Taylor Swift watching from a suite, and Hopkins finished with eight catches for 86 yards as the Chiefs ran their winning streak to 14 dating to last season. They became the sixth Super Bowl champion to start 8-0 the following season.

Mayfield finished with 200 yards and two TDs passing for the Bucs, who have lost four of their last five.

It was a memorable first half for two players who had been waiting to play in Arrowhead Stadium.

The Bucs’ Rachaad White grew up about 10 minutes away in a tough part of Kansas City, but his family could never afford a ticket for him to see a game. He wound up on a circuitous path through Division II Nebraska-Kearney and a California junior college to Arizona State, where he eventually became of a third-round pick of Tampa Bay in the 2022 draft.

Two year later, White finally got into Arrowhead — and the end zone. He punctuated his seven-yard scoring run in the second quarter, which gave the Bucs a 7-3 lead, by nearly tossing the football into the second deck.

Then it was Hopkins’ turn in his first home game since arriving in Kansas City from a trade with the Titans.

The three-time All-Pro, who already had caught four passes, reeled in a third-down heave from Mahomes amid triple coverage for a 35-yard gain inside the Tampa Bay five-yard line. Three plays later, Mahomes found him in the back of the end zone, and Hopkins celebrated his first TD with the Chiefs with a dance from “Remember the Titans.”

Tampa Bay tried to seize control with consecutive scoring drives to start the second half. The first ended with a TD pass to Cade Otton, the latest tight end to shred the Chiefs, and Chase McLaughlin’s 47-yard field goal gave the Bucs a 17-10 lead.

The Chiefs answered in the fourth quarter. Mahomes marched them through the rain 70 yards for a tying touchdown pass, which he delivered to Samaje Perine while landing awkwardly and tweaking his left ankle, and then threw a laser to Hopkins on third-and-goal from the Buccaneers’ five-yard line to give Kansas City the lead.

Tampa Bay promptly went three-and-out, but its defence got the ball right back, and this time Mayfield calmly led his team down field. His capped the drive with a touchdown throw to Miller — his first career TD catch — with 27 seconds to go, and Tampa Bay elected to play for overtime.

UP NEXT

Buccaneers: Host the San Francisco 49ers on Sunday.

Chiefs: Host the Denver Broncos on Sunday.

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NHL roundup: Kuemper helps visiting Kings shut out Predators 3-0

Published

5 hours ago

November 4, 2024

Anne Joseph

NASHVILLE, Tenn. (AP) — Darcy Kuemper made 16 saves for his first shutout of the season and 32nd overall, helping the Los Angeles Kings beat the Nashville Predators 3-0 on Monday night.

Adrian Kempe had a goal and an assist and Anze Kopitar and Kevin Fiala also scored. The Kings have won two of their last three.

Juuse Saros made 24 saves for the Predators. They are 1-2-1 in their last four.

Kopitar opened the scoring with 6:36 remaining in the opening period. Saros denied the Kings captain’s first shot, but Kopitar collected the rebound below the goal line and banked it off the netminder’s skate.

Fiala, a former Predator, made it 2-0 35 seconds into the third.

The Kings held Nashville to just three third-period shots on goal, the first coming with 3:55 remaining and Saros pulled for an extra attacker.

Elsewhere in the NHL on Monday:

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DEVILS 3 OILERS 0

EDMONTON, Alta. (AP) — Jake Allen made 31 saves for his second shutout of the season and 26th of his NHL career, helping the New Jersey Devils close their western Canadian road trip with a 3-0 victory over the Edmonton Oilers.

Jesper Bratt had a goal and an assist and Stefan Noesen and Timo Meier also scored. The Devils improved to 8-5-2. They have won three of their last four after a four-game skid.

Calvin Pickard made 13 saves for Edmonton. The Oilers had won two straight.

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