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.

Get local stories you won't find anywhere else right to your inbox.
Sign up here

Just Posted

Classic tale staged in Vernon seeks local ballet dancers

Anne of Green Gables, by Ballet Jorgen

Vernon youth ready to make some NOYSE

Showcase of excellence features talents of young local performance

Vernon Vixens leave Merritt hockey tournament undefeated

Team sweeps all four games while out-scoring opponents 21-3

Vernon museum praises local group for spearheading RCMP Appreciation Day

Feb. 1 has been officially proclaimed Royal Canadian Mounted Police Appreciation Day

North Okanagan Knights pull out overtime victory over Sicamous

Knights goalie Sean Kanervisto gets first win after being named a top KIJHL rookie

VIDEO: Music stars pay tribute to Kobe Bryant at Grammys award show

Music artists including Billy Ray Cyrus, Rick Ross and Kirk Franklin paid tribute to Bryant

Pregnant B.C. woman stuck in Wuhan, the epicentre of coronavirus outbreak

Woman is due to give birth in Wuhan, China unless she can get out

Victoria-area wolf tranquilized after being seen running around neighbourhood

Officials say wolf unharmed during its ‘arrest’

Ontario confirms second presumptive coronavirus case in wife of first patient

Both arrived on a China Southern Airlines flight after having been to Wuhan

Canada’s basketball community mourns Kobe Bryant after helicopter crash

Bryant was an 18-time NBA all-star who won five championships

Rockslide obstructing traffic on rural Shuswap road

Large boulders rolled onto Sunnybrae Canoe-Point Road in the South Shuswap.

‘Devastated’: Fans, celebrities remember Kobe Bryant after his death

Bryant played all of his 20-year career with the NBA with the Los Angeles Lakers

Kobe Bryant, daughter killed in California helicopter crash

Bryant entered the NBA draft straight out of high school in 1996

Investigation launched after six dead puppies dumped in Richmond hotel parking lot

RAPS reminds people they can always give up puppies they can’t take care of

Most Read