Rankin Inlet (Oct 27/04) - Kivalliq residents are being urged to receive their annual flu shot, especially those in high-risk categories.

People who benefit the most from the shot are those with chronic heart or lung disorders, as well as immunity problems such as diabetes and kidney disease.

As well, people 50 years or older, and children between the ages of six months to five years, are most vulnerable to the flu virus.

The immunization has a piece of dead flu virus which the body recognizes as an intruder and builds antibodies against.

When a live virus comes along capable of causing infection, the body already knows how to fight it.

Registered nurse Fred Montpetit of Rankin Inlet says people react differently to the shot and there can be side effects.

He says the most common is the arm becoming sore and feeling heavy.

"It's not uncommon to feel feverish and sore for a day or so while your body builds an immunity," says Montpetit.

"If you're allergic to eggs, you can have a reaction to the flu shot because the virus is cultured in egg protein.

"But, despite a few possible side effects, it is well documented that the flu shot significantly decreases the odds of contracting the flu virus."

Strains monitored

Flu strains circulating in a given year are closely monitored while the immunization is being developed for Canada.

Australia, in particular, is watched closely because it has much of the same demographics as Canada.

The flu shot is geared towards the three most prevalent strains -- two strains of influenza "A" and one strain of influenza "B."

This year's formula protects against influenza "A" types New Caledonia and Fijian, and influenza "B" type Shanghai.

Montpetit says last year's formula didn't contain the Fijian component, which became the most-prevalent strain in Canada.

"It is quite possible to receive the shot and still contract the flu, but your chances are greatly diminished when you get the shot. The immunity from a flu shot lasts about six months, which is another reason why it's recommended every year."