Most Canadians have hybrid COVID-19 immunity. Could it prevent a fall wave? | Canada News Media
Connect with us

News

Most Canadians have hybrid COVID-19 immunity. Could it prevent a fall wave?

Published

 on

After more than three years of COVID-19, most people in Canada have developed immunity against the virus through a mix of infection and vaccination, data shows.

By March 2023, more than 75 per cent of the population had immunity because of a COVID-19 infection, according to a study published in the Canadian Medical Association Journal (CMAJ) Monday. 

Researchers at the COVID-19 Immunity Task Force looked at blood samples of thousands of Canadians of all ages collected between March 2020 and March 2023 and found that the Omicron variant led to a rapid rise in infection-induced antibodies last year.

During the Omicron waves, the rates of infection-acquired immunity appeared to be highest among younger Canadians, the CMAJ research showed.

“Data up to March 2023 indicate that most people in Canada had acquired antibodies against SARS-CoV-2 through natural infection and vaccination,” the authors said in the peer-reviewed study.

The research sheds new light on the impact of the highly transmissible Omicron variant — which was first detected in Canada in December 2021 — which caused many Canadians to get infected for the first time with COVID-19.

The study also said most people in the country had been vaccinated by the time the Omicron variant surged in Canada – and that coupled with an uptick in cases ushered in “an era of hybrid immunity” that potentially could protect against infection for months.

Despite the high vaccine coverage, the hybrid immunity from vaccines and previous infections was not enough to slow the spread of Omicron, the CMAJ study stated.

“I think the big message out of this is that vaccination is hugely important still,” said Gerald Evans, an infectious diseases specialist at Queen’s University in Kingston, Ont.

“We had vaccine immunity prior to the Omicron surge in … most of the people who were at high risk, of course, which are older people and people with underlying conditions,” he told Global News.

Canada’s National Advisory Committee on Immunization (NACI) released fall booster guidance last month, recommending a dose of the new formulation of the COVID-19 vaccine for the authorized age groups.

NACI says all Canadians aged five years and up should get a COVID-19 booster in the fall if it has been at least six months since their last vaccine dose or infection, whichever is later.

 

Evans estimates about one in four Canadians likely have still not had COVID-19, but they’re probably protected by vaccination, he said.

Hybrid immunity – from both vaccination and prior infection – does confer some added benefits, Evans said, especially as new variants emerge.

“We’re not seeing anywhere near the number of COVID cases we saw even last summer when we actually had a bit of a summer surge,” he said.

“So this is telling us that right now, at least, this hybrid immunity that we have is doing a good job at protecting us a lot.”

However, the authors of the CMAJ study did warn about the potential for waning antibody levels and new variants that may escape immunity.

A fast-spreading COVID-19 subvariant of Omicron is now circulating in Canada and globally.

The World Health Organization (WHO) has classified EG.5 as a “variant of interest.”

Experts in Canada are warning about another surge in COVID-19 cases in the fall as schools reopen, the weather cools and people spend more time indoors.

“We will see a rise in cases, perhaps a surge, but I don’t think we’re going to see a wave of cases, at least at this point, unless something changes,” Evans said.

 

Source link

Continue Reading

News

Christian McCaffrey is placed on injured reserve for the 49ers and will miss at least 4 more games

Published

 on

SANTA CLARA, Calif. (AP) — The San Francisco 49ers placed All-Pro running back Christian McCaffrey on injured reserve because of his lingering calf and Achilles tendon injuries.

The move made Saturday means McCaffrey will miss at least four more games after already sitting out the season opener. He is eligible to return for a Thursday night game in Seattle on Oct. 10.

McCaffrey got hurt early in training camp and missed four weeks of practice before returning to the field on a limited basis last week. He was a late scratch for the opener on Monday night against the Jets and now is sidelined again after experiencing pain following practice on Thursday.

McCaffrey led the NFL last season with 2,023 yards from scrimmage and was tied for the league lead with 21 touchdowns, winning AP Offensive Player of the Year.

The Niners made up for McCaffrey’s absence thanks to a strong performance from backup Jordan Mason, who had 28 carries for 147 yards and a touchdown in San Francisco’s 32-19 victory over the New York Jets. Mason is set to start again Sunday at Minnesota.

After missing 23 games because of injuries in his final two full seasons with Carolina, McCaffrey had been healthy the past two seasons.

He missed only one game combined in 2022-23 — a meaningless Week 18 game last season for San Francisco when he had a sore calf. His 798 combined touches from scrimmage in the regular season and playoffs were the third most for any player in a two-year span in the past 10 years.

Now San Francisco will likely rely heavily on Mason, a former undrafted free agent out of Georgia Tech who had 83 carries his first two seasons. He had at least 10 touches just twice before the season opener, when his 28 carries were the most by a 49ers player in a regular-season game since Frank Gore had 31 against Seattle on Oct. 30, 2011.

The Niners also have fourth-round rookie Isaac Guerendo and Patrick Taylor Jr. on the active roster. Guerendo played three offensive snaps with no touches in the opener. Taylor had 65 carries for Green Bay from 2021-23.

San Francisco also elevated safety Tracy Walker III from the practice squad for Sunday’s game against Minnesota.

___

AP NFL:

The Canadian Press. All rights reserved.



Source link

Continue Reading

News

Canada’s Newman, Arop secure third-place finishes at Diamond League track event

Published

 on

BRUSSELS – Canada walked away with some hardware at the Diamond League track and field competition Saturday.

Alysha Newman finished third in women’s pole vault, while Marco Arop did the same in the men’s 800-metre race.

Newman won a bronze medal in her event at the recent Paris Olympics. Arop grabbed silver at the same distance in France last month.

Australia’s Nina Kennedy, who captured gold at the Summer Games, again finished atop the podium. Sandi Morris of the United States was second.

Newman set a national record when she secured Canada’s first-ever pole vault medal with a bronze at the Olympics with a height of 4.85 metres. The 30-year-old from London, Ont., cleared 4.80 metres in her second attempt Saturday, but was unable conquer 4.88 metres on three attempts.

Arop, a 25-year-old from Edmonton, finished the men’s 800 metres with a time of one minute 43.25 seconds. Olympic gold medallist Emmanuel Wanyonyi of Kenya was first with a time of 1:42.70.

Djamel Sedjati, edged out by Arop for silver in Paris last month, was second 1:42.87

This report by The Canadian Press was first published Sept. 14, 2024.

The Canadian Press. All rights reserved.



Source link

Continue Reading

News

Bologna prepares for Champions League debut with draw at Como while Juventus held

Published

 on

MILAN (AP) — Bologna’s preparations for its Champions League debut are not going well though it managed to spoil Como’s first Serie A home match in 21 years on Saturday.

Bologna came from two goals down to salvage a 2-2 draw to gather three points from its opening four matches.

Bologna hosts Shakhtar Donetsk on Wednesday. Its only other appearance in Europe’s top competition was in 1964 in the preliminary round of the old European Cup.

AC Milan is also winless as it prepares for a Tuesday Champions League match against Liverpool. The Rossoneri hosted promoted Venezia later. Juventus drew at Empoli 0-0.

Como made a great start in the fifth minute when Patrick Cutrone attempted to roll the ball across the six-yard box but it took a huge deflection off Bologna defender Nicolò Casale for an own goal.

Bologna thought it was gifted a way back into the match on the stroke of halftime when referee Marco Piccinini signalled for a penalty following an Alberto Moreno handball, but he revoked his decision and instead gave a free kick because the handball was just outside the area.

Bologna improved after the break but found itself further behind when Cutrone raced onto a through ball and cut inside past a defender and fired into the far bottom corner.

Tommaso Pobega hit the post for Bologna, which finally pulled one back in the 76th through substitute Santiago Castro.

Another substitute helped the visitors snatch a point when Samuel Iling-Junior curled a fine strike into the top left corner in stoppage time.

Unbeaten sides

Juventus, and more surprisingly Empoli, are among six unbeaten sides.

Empoli held Monza and Bologna to draws either side of a shock 2-1 win at Roma. Juventus’ perfect start to the season was ruined by Roma in a goalless draw before the international break.

On Saturday, there were few clearcut chances in Empoli although home goalkeeper Devis Vásquez made spectacular saves to fingertip out a Federico Gatti header and deny Dusan Vlahovic in a one on one with the Juventus forward.

Empoli had a good opportunity in the 73rd minute following an Alberto Grassi one-two with Pietro Pellegri but the finish was straight at Mattia Perin.

The host could have won it right at the death but Gatti flew in with a great sliding block to keep out Emanuel Gyasi’s close-range effort.

Juventus hosts PSV Eindhoven in the Champions League on Tuesday.

___

AP soccer:

The Canadian Press. All rights reserved.



Source link

Continue Reading

Trending

Exit mobile version