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Flu does what it likes : Why you might still get sick this season

Flu does what it likes : Why you might still get sick this season
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This years flu season may have gotten off to a slow, late start, but doctors offices and hospitals are now starting to see a surge in patients.

According to the Public Health Agency of Canadas FluWatch program , the number of flu cases have been rising steadily over the last weeks, ramping up toward peak levels.

That means this year s season could run late into the spring, says Dr. Allison McGeer, the director of Infection Control at Torontos Mount Sinai Hospital.

Normally, influenza activity is substantially down by the end of March. This year, its probably going to extend into April, she told CTVNews.ca.

Im betting on mid to late April before its over.

The late start means patients can expect crowded hospital emergency departments and doctors offices over the next few weeks.

In Saskatchewan, two of Saskatoon s three major hospitals reported this week they are overwhelmed and in a " critical overcapacity situation ," because an increase in flu is putting stress on the system.

While one might assume that this years milder-than-normal winter is the reason behind the late arrival of the flu, McGeer says thats not necessarily so. Influenza arrives in waves and each year is different from the last.

Flu does what it likes. The season starts when flu viruses decide that the flu season will start. Its just not something we can predict, she said.

The good news, though, is that this years season is turning out to be a mild one, with fewer hospitalizations and severe illnesses.

McGeer says thats in part because last year, the dominant strain was H3N2, which tends to affect seniors harder than others and leads to more hospitalizations.

This year, the dominant strain is H1N1, or swine flu, which isnt as hard on seniors because of previous immunity, but is harder on young children.

So we wont see as many older people with flu this year as in other years, but we will see more pregnant women with flu and more kids with flu, she said.

Another bit of good news is that the flu vaccine is generally very effective at preventing H1N1.

That means vaccine efficacy will definitely be good this year. And its looking pretty good against H3N2 as well, she said.

U.S. health authorities are already reporting that this years vaccine is doing a good job at preventing infections. It s been a milder flu season south of the border, though the season has not yet peaked there either.

As for those who still havent gotten the flu shot, McGeer says the further we get into the season, the less benefit one can expect from the vaccine. But if you have a small child at home or have close contact with an immune-compromised senior or someone undergoing chemotherapy, you might still want to get it.

And if you were diligent enough to get the vaccine early, in October, theres no reason to worry you wont stay protected if the season runs late.
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