Millions of Canadian kids just walked back into classrooms after a summer of travel, camps and family visits. Every immunologist in the country knows exactly what happens next.
The latest federal surveillance shows influenza, COVID-19 and RSV all sitting at low, stable levels right now, and experts told CBC News this is likely the calm before the storm. Planning your family's fall vaccines early is what turns that warning into protection rather than a scramble.
Why does this season worry doctors, and why this fall has doctors' attention
Part of it is the usual seasonal math. As Saskatoon pediatrician Dr. Ayisha Kurji explained, colder weather pushes everyone indoors, the bugs spread, emergency visits climb, and more kids end up in hospital. One recent report found hospitalization rates for illnesses like COVID and flu have doubled compared with pre-pandemic levels, part of the same strain behind reporting on why emergency rooms are losing doctors.
The other part is newer and more worrying. Routine childhood vaccination has slipped since the pandemic. Federal data shows just 85 percent of two-year-olds were fully vaccinated against measles, mumps and rubella by the end of 2025, short of the 95 percent experts say is needed, and fewer than 80 percent were fully covered against diphtheria, tetanus and whooping cough. The consequences are no longer theoretical. Canada lost its official measles elimination status last November after more than 5,000 infections since late 2024. Canada's chief public health officer, Dr. Joss Reimer, said the spread shows what happens when coverage dips, with the risk falling hardest on children too young to be vaccinated.
What should families plan for, and what this means for your family
The flu shot remains the anchor of your fall vaccines, and it is recommended for all Canadians aged six months and older. Timing matters more than most people realize. McMaster University immunologist Matthew Miller notes it takes roughly two to four weeks after the shot for your immune system to reach peak protection, which is why experts push for vaccination early in the fall rather than waiting for the first big wave.
Beyond the flu shot, Canada's national vaccine advisory body recommends a COVID shot for higher-risk people, including adults 65 and up, anyone who is pregnant, and those with underlying conditions. RSV protection is available for older adults and during pregnancy, and the newer maternal RSV vaccine has posted striking results, with one large study finding it cut babies' risk of hospitalization by more than 80 per cent, one reason protecting health during pregnancy is getting fresh attention. This is also the moment to check that your kids are caught up on routine shots, since measles is highly preventable, with one dose offering strong protection and two doses close to perfect.
What can you do now, and what you can do before the waves hit
The practical checklist for fall vaccines is short. Look up your kids' immunization records now rather than during an outbreak, and ask about catch-up doses if anything was missed during the pandemic years. Plan the flu shot for early in the season so protection is in place before the waves hit. If anyone in your home is 65 or older, pregnant or managing a chronic condition, ask about COVID and RSV shots at the same visit. And keep the old standbys in play through the fall, since handwashing and staying home when sick still do real work, the same seasonal vigilance that matters when mosquito-borne illness returns.
Frequently asked questions
When should I get my flu shot in Canada this fall?
Aim for early fall, before influenza starts circulating widely. It takes about two to four weeks after the shot for your immune system to reach peak protection, so getting it early rather than waiting for the first big wave means you are covered when illness climbs. The flu shot is recommended for everyone six months and older.
Which fall vaccines should my family consider?
The flu shot is recommended for everyone six months and up. A COVID shot is advised for higher-risk people, including adults 65 and older, pregnant people and those with underlying conditions. RSV protection is available for older adults and during pregnancy. Children should also be caught up on routine shots like measles, mumps and rubella.
Why is measles a concern in Canada again?
Canada lost its official measles elimination status in November after more than 5,000 infections since late 2024. Coverage has slipped, with only about 85 percent of two-year-olds fully vaccinated against measles, mumps and rubella by the end of 2025, below the 95 percent needed to keep the virus from spreading in communities.
Does the RSV vaccine in pregnancy protect the baby?
Yes. The maternal RSV vaccine given during pregnancy has shown strong real-world results, with one large study finding it cut infants' risk of RSV hospitalization by more than 80 percent. RSV can be extremely dangerous for newborns, so maternal vaccination is one of the main ways to protect babies in their first months.
Where to book your fall shots
When you are ready to book, you can find nearby pharmacies and clinics offering fall vaccinations along with current wait times, or read more seasonal health coverage on the Medimap Health Hub, so the whole family can get protected in one quick stop.
This article is general information, not medical advice. It is not a substitute for care from a qualified health professional. Talk to a doctor, nurse or pharmacist about which vaccines are right for you. For an emergency, call 911.
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