Flu vaccine less effective against mutant strain

B.C. Centre For Disease Control says some protection still better than none, flu season may be deadlier than usual for elderly

Dr. Danuta Skowronski is an epidemiologist with the B.C. Centre For Disease Control.

This year’s flu shot may prove less effective than usual because the dominant virus now circulating has mutated significantly in the months since the vaccine was devised.

The H3N2 strain – one of three targeted in this year’s flu vaccine – is thought to have changed its genetic makeup enough to possibly thwart the antibodies that the vaccine activates.

Dr. Danuta Skowronski, an epidemiologist with the B.C. Centre for Disease Control, is still recommending the vaccine, particularly for the elderly, the chronically ill and those with compromised immune systems.

“It’s not a perfect match,” she said. “But for the high risk, even an imperfectly matched vaccine is going to give cross protection. And for some people it could be life-saving.”

She said the H3N2 strain tends to be particularly nasty to the elderly and may bring a deadlier flu season than usual.

“We may see more hospitalizations or deaths this year,” Skowronski said.

She said it’s particularly concerning that the flu has struck B.C.  surprisingly early this season, causing outbreaks in eight seniors’ care homes.

MORE RESOURCES: Flu shot clinic locator

The vaccine was formulated last February because it takes six to eight months to produce in large quantities and the H3N2 virus is thought to have since mutated while circulating in the southern hemisphere.

Skowronski said it’s still not too late to get the shot and some protection when flu activity peaks in the weeks ahead, including any later surge of cases of influenza B, which tends to peak in March or April.

The vaccine also targets the influenza B and H1N1 viruses, but they’re considered less likely to cause illness this flu season.

Even in years when the vaccine is a better fit – last year’s was about 70 per cent effective against the then-dominant H1N1 strain – Skowronksi says everyone should wash their hands frequently and avoid touching their eyes, nose and mouth.

People who get the flu shot often mistakenly think any illness they contract can’t be flu and sometimes fail to get appropriate treatment.

“It doesn’t make you invincible,” Skowronski said.

Anti-viral medication can stop or fight an influenza infection but must be given quickly, ideally within 12 hours of the start of symptoms.

An estimated 3,500 Canadians die each year from flu complications – mainly seniors and others with underlying conditions.

Just Posted

Police want to talk to two pedestrians who might have witnessed shooting

Nobody injured in Sept. 18 shooting on Flagman Street in Abbotsford

VIDEO: Tributes for the man known as the “Mormon Giant”

Langley champion professional wrestler passes away

More people vote in Langley advance polls

Numbers nearly double in Township, but that may not be a result of increased interest

HIGHLIGHTS: Another record-breaking night for Vancouver Giants

G-Men registered a record 71 shots in a 6-2 home triumph over Swift Current Tuesday in Langley.

10 things still illegal in the new age of recreational cannabis

Pot is legal – but there are still a lot of rules, and breaking some could leave you in jail

VIDEO: How to roll a joint

The cannabis connoisseur shares his secrets to rolling the perfect joint

Puff, puff, pass: Cannabis is officially legal across Canada

B.C. has only one bricks-and-mortar marijuana store

After 50 years, ‘Sesame Street’ Big Bird puppeteer retiring

The puppeteer who has played Big Bird on “Sesame Street” is retiring after nearly 50 years on the show.

Britain, EU decide to take some time in getting Brexit right

Brexit negotiator Michel Barnier said “we need much time, much more time and we continue to work in the next weeks.”

Parole denied for convicted killer-rapist Paul Bernardo after 25 years in prison

Paul Bernardo plead for release on Wednesday by arguing he has done what he could to improve himself during his 25 years in prison.

Man holds newborn son for first time after devastating B.C. racetrack crash

Kayden was born the day after Jonathan was crushed by car at speedway

Smooth start to legal cannabis in B.C., Mike Farnworth says

Online and government store makes 4,000 sales by noon

Fraser Valley Throwdown returns this weekend

Abbotsford event back for third annual crossfit competition

B.C. Lions look to cement CFL playoff spot with victory over Eskimos

B.C. can cement a post-season berth in the wild West Division on Friday night with a home win over the Edmonton Eskimos

Most Read