Every fall, healthcare providers across Canada encourage patients to roll up their sleeves for one important reason: protection against influenza.
While many people think of the flu as little more than a bad cold, influenza is a serious respiratory illness that sends thousands of Canadians to the hospital each year. It can lead to severe complications, especially among older adults, young children, pregnant individuals, and those living with chronic health conditions.
The good news is that one simple step can significantly reduce those risks. The flu vaccine remains the most effective way to protect against influenza and its complications.
What Is the Flu?
Influenza, commonly known as the flu, is a contagious respiratory illness caused by influenza viruses. Symptoms can include:
- Fever
- Chills
- Cough
- Sore throat
- Muscle aches
- Fatigue
- Headache
- Runny or stuffy nose
Although most people recover within a week or two, some individuals develop serious complications such as pneumonia, respiratory failure, worsening of chronic conditions, hospitalization, or even death.
In Canada, influenza remains among the leading causes of death. Each year, it contributes to approximately 15,000 hospitalizations and 3,500 deaths nationwide.
Why Is the Flu Vaccine Important?
The flu vaccine is considered the best defence against influenza. It helps protect individuals by:
- Reducing the chance of becoming infected
- Lowering the risk of serious complications
- Helping prevent hospitalizations
- Reducing the spread of influenza to family members, coworkers, and vulnerable individuals in the community
Even when the vaccine is not a perfect match for circulating strains, vaccinated individuals are generally better protected than those who remain unvaccinated.
Why Is a New Flu Vaccine Needed Every Year?
Unlike some viruses that remain relatively stable, influenza viruses change constantly.
Each year, experts from the World Health Organization monitor influenza activity around the globe and recommend which strains should be included in the upcoming season’s vaccine. This process helps ensure that annual vaccines target the strains most likely to circulate during the upcoming flu season.
Because the circulating strains can change from year to year, annual vaccination is recommended for ongoing protection.
Who Should Get the Flu Vaccine?
Health Canada recommends that nearly everyone aged six months and older receive a flu vaccine each year.
Some groups are particularly encouraged to get vaccinated because they face a higher risk of severe illness and complications.
Older Adults
Adults aged 65 and older are more likely to experience serious outcomes from influenza. Age-related changes in the immune system can make it harder for the body to fight infection effectively.
Young Children
Children under five years of age are at increased risk because their immune systems are still developing. They are also more likely to be exposed to influenza in settings such as daycare centres, preschools, and schools.
Pregnant Individuals
Pregnancy increases the risk of serious flu-related complications. Vaccination during pregnancy is safe and can also provide protection to babies during their first months of life, when they are too young to receive a flu vaccine themselves.
People with Chronic Health Conditions
Individuals living with conditions such as diabetes, heart disease, lung disease, kidney disease, cancer, weakened immune systems, or severe obesity face a greater risk of complications from influenza. In many cases, the flu can worsen existing medical conditions.
Residents of Long-Term Care Facilities
Influenza can spread quickly in communal living environments. Residents of nursing homes and long-term care facilities often have additional health conditions that increase their vulnerability to severe illness.
How Effective Is the Flu Vaccine?
No vaccine can provide 100% protection, but flu vaccination remains one of the most effective tools available for reducing illness and complications.
Protection generally develops about two weeks after vaccination. Vaccine effectiveness varies from season to season and depends on factors such as age, overall health, and how closely the vaccine matches circulating influenza strains.
Even during years when effectiveness is lower, vaccination continues to provide meaningful protection against severe disease and hospitalization.
Can the Flu Vaccine Give You the Flu?
No.
This is one of the most common myths surrounding influenza vaccination.
The flu vaccine cannot cause influenza infection. Some individuals may experience mild side effects such as soreness at the injection site, mild fatigue, or low-grade fever, but these symptoms typically resolve within a few days. Serious reactions are extremely rare.
How Are Flu Vaccines Tested for Safety?
Vaccines used in Canada undergo extensive research, clinical trials, regulatory review, and ongoing monitoring before and after approval.
Before a vaccine becomes available:
- Researchers conduct laboratory testing and clinical trials.
- Health Canada reviews safety, effectiveness, quality, and manufacturing standards.
- Independent experts evaluate how the vaccine should be used.
- Manufacturers follow strict quality-control requirements.
- Public health agencies continuously monitor vaccine safety after approval.
This process helps ensure that vaccines available to Canadians meet rigorous safety standards.
What If You Still Get the Flu?
While vaccination lowers the risk of infection, it does not eliminate it entirely.
If flu symptoms develop, most people recover with:
- Rest
- Fluids
- Over-the-counter medications to manage fever and discomfort
Some patients, particularly those at higher risk of complications, may benefit from prescription antiviral medications prescribed by a healthcare provider.
People with influenza can spread the virus beginning about one day before symptoms appear and for several days afterward. Staying home when sick, covering coughs and sneezes, cleaning hands regularly, and wearing a mask when necessary can help reduce transmission.
Getting a Flu Vaccine at Shorewell Pharmacy Group
Flu season arrives every year, but preparation can begin before cases start to rise in the community.
Pharmacists at Shorewell Pharmacy Group can help answer questions about influenza vaccination, determine eligibility, and administer flu vaccines where available. Vaccination remains one of the simplest and most effective ways to protect personal health while helping safeguard family members, coworkers, and the broader community.
As respiratory illness season approaches, getting a flu vaccine is an investment in both individual and community health.
References
Government of Canada. Get your flu shot. Public Health Agency of Canada. Available at: https://www.canada.ca/en/public-health/services/diseases/flu-influenza/get-your-flu-shot.html
Government of Canada. Who is most at risk from influenza. Public Health Agency of Canada. Available at: https://www.canada.ca/en/public-health/services/diseases/flu-influenza.html
Government of Canada. Vaccine safety. Public Health Agency of Canada. Available at: https://www.canada.ca/en/public-health/services/health-concerns/vaccine-safety.html