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Summary

Built around Asthma Canada's "September Asthma Peak," this piece traces how back-to-school illness season actually plays out for older adults, and what NACI recommends they do differently.

Every year, in the third week of September like clockwork, Canadian emergency rooms see a documented spike in asthma hospitalizations among children. Asthma Canada tracks it closely enough to have given it a name: the September Asthma Peak.

The mechanism is almost mundane. Kids go back to school, spend the day in close contact with dozens of other kids for the first time in two months, and start trading colds within days. Up to 85 per cent of childhood asthma attacks are triggered by viral infections, and the common cold alone accounts for as much as 60 per cent of those. September just happens to be when the exposure resets all at once.

That part of the story gets covered every year. The part that doesn’t is what happens two or three weeks later, in a completely different age group.

The Wave Doesn’t Stop At The School Gate

Cold and flu season in Canada generally runs from September through May, and it tends to intensify right after school resumes. That’s not a coincidence. Children are, by a wide margin, the most efficient spreaders of respiratory viruses in any household, both because their immune systems are still developing and because they’re simply in closer, longer contact with more people every day than most adults are.

Every one of those viruses a kid brings home eventually meets someone else at the dinner table. And the people most likely to be seriously affected by it aren’t the kids.

Who Ends Up In The Hospital

Canada’s public health agency lists adults 65 and older as one of the groups at highest risk of serious flu complications and hospitalization. That’s not a minor statistical footnote. Influenza and pneumonia together sit among the top ten leading causes of death in Canada, and in an average year, the country sees roughly 12,200 flu-related hospitalizations and about 3,500 deaths.

Older immune systems don’t respond to infection or to standard vaccines the same way younger ones do, which is exactly why Canada’s National Advisory Committee on Immunization doesn’t recommend the same flu shot across the board. For adults 65 and older, it specifically recommends an enhanced vaccine, either a high-dose or an adjuvanted formulation, over the standard dose most younger adults get. In large trials, the high-dose version left people 65 and older 18 to 24 per cent less likely to develop lab-confirmed influenza than the standard shot did.

Most people have no idea there’s a difference. Plenty walk into a pharmacy in October, take whatever shot is offered that day, and assume all flu vaccines are interchangeable. For anyone over 65, they’re not.

The Fall Checklist

None of this requires a dramatic lifestyle change. It requires knowing two things most people don’t:

  • The wave is predictable. It starts building in the third week of September and keeps climbing into October, which means the window to get ahead of it, rather than react to it, is now, not after the first cough shows up at Thanksgiving.
  • The shot matters. Adults 65 and older should specifically ask for the high-dose or adjuvanted flu vaccine, not just whichever one is on the counter.

The kids were never really the whole story. They’re the delivery system. The people the wave actually lands hardest on are the ones sitting across the table from them.

~ Read more from The Health Insider ~

The information provided on TheHealthInsider.ca is for educational purposes only and does not substitute for professional medical advice. TheHealthInsider.ca advises consulting a medical professional or healthcare provider when seeking medical advice, diagnoses, or treatment. To read about our editorial review process click here.

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