Influenza (the Flu)

Most us of are at risk of infection from the influenza virus. People at greater risk of complications from flu include:

• Adults and children with certain chronic medical conditions including:
  • Anemia
  • Asthma
  • Lung, heart and kidney disease
  • Neurologic or neurodevelopment conditions
  • Diabetes
  • Cancer
  • Weakened immune systems due to disease or medication
  • Morbid obesity
• Residents of nursing homes and chronic care homes
• Persons 65 years of age and older
• Children under 5 years old
• Pregnant women
• Indigenous peoples

Colds, vomiting, diarrhea (often referred to as "stomach flu") and other viral infections are often confused with the flu but different viruses cause them.

Cold and Flu symptoms are similar to the symptoms of COVID-19. For more information about signs and symptoms of COVID-19 and whether you need to get tested, visit the COVID-19 (2019 Novel Coronavirus) webpage.

* Colds do not generally result in serious health problems, such as pneumonia or bacterial infections.

Note: Children might also experience the croup, ear infections, nausea, vomiting and diarrhea when they have influenza – symptoms that are not common in adults.

Please note, these symptoms are subject to change. For the latest on symptoms, visit the Ontario Ministry of Health’s Guidance for the Health Sector webpage (external link).

The flu vaccine is designed to protect against strains of the influenza virus that are expected to be circulating during the upcoming influenza season. The vaccine stimulates your body’s immune system to build antibodies against influenza, making it stronger and ready to fight off the illness before it starts.

The National Advisory Committee on Immunization (NACI) (external link) recommends the flu vaccine for anyone 6 months of age and older who has not had an adverse reaction to the vaccine. It is especially recommended for persons:

• at high risk of severe disease, flu-related complications or hospitalization;
• capable of transmitting the flu to those at high risk;
• who provide essential community services; and
• in direct contact with poultry infected with avian influenza during culling operations.

Individuals who should not get the flu vaccine include anyone who:

• has had severe allergic reaction within 24 hours of receiving an flu vaccine such as:
  • wheezing
  • chest tightness
  • difficulty breathing
• has had a significant allergic reaction to any component of the vaccine except for egg;
• has a new or worsening illness, with or without fever;
• has had Guillain-Barré Syndrome within 6 weeks of a past influenza vaccine;
• has had Oculorespiratory syndrome with lower respiratory symptoms;
• is under 6 months of age.

Consult with your Health Care Provider if you meet these criteria to determine if the flu vaccine is right for you.

To get your free flu immunization, book an appointment with:

• your doctor
• a local pharmacy*
• a walk-in clinic

*Children under 2 years of age must visit their doctor. Looking for a family doctor? We can help.

Participating pharmacies are offering both the high-dose and regular flu vaccines. Find the closest participating pharmacy in:

• Burlington (extearnl link)
• Halton Hills (extearnl link)
• Milton (extearnl link)
• Oakville (extearnl link)

Residents can also sign up to be notified when and where flu shots become available by visiting MyFluShot.ca.

Keep a record of your flu vaccination

• After you get your immunization, you will be given a written record. Add this information to your immunization record.
• If you received the vaccine at a pharmacy, share this information with your regular health care provider. 
• If you develop respiratory symptoms over the next few months, this information will be an important part of your care plan.

Safety and side effects

• The flu vaccine is safe. Most people who get the vaccine have either no or mild side effects. Mild side effects, which occur within one to two days after vaccination, include soreness, redness or swelling at the injection site.
• Life-threatening allergic reactions are very rare. In very rare cases, the flu vaccine has been associated with Guillain-Barré Syndrome (GBS), a very uncommon disease that causes muscle paralysis. The risk is about 1 in one million doses of vaccine given.

Ocular respiratory syndrome (ORS)

• In 2000-2001, a small number of people who received the influenza vaccine developed ORS.
• ORS can cause red eyes, cough, chest tightness, difficulty breathing, hoarseness, sore throat and swelling of the face.
• Symptoms occur within 24 hours and resolve within 48 hours.
• Persons who experienced ORS in the past may safely have the flu vaccine but should talk to their health care provider before being immunized.

When do I seek medical attention?

As with other vaccines, you should stay on site in the health care provider’s office (or pharmacy) for at least 15 minutes after receiving your immunization. You should seek medical attention if you experience the following:

• Swelling of the lips, tongue or face
• Trouble breathing
• Hives
• Convulsions
• Dizziness
• Lasting or worsening weakness
• High fever (40°C or 104°F)

Influenza vaccine effectiveness can vary from year to year and among different age and risk groups. It cannot protect you from other types of viruses circulating in the fall/winter months that can cause illness much like influenza. The body needs two weeks to build up protection to the flu virus after you receive immunization; protection might last up to one year.

High dose quadrivalent vaccine (QIV-HD) and adjuvanted trivalent vaccine (TIV-adj) is authorized only for persons 65 years of age and older.

However, the Standard dose Quadrivalent (QIV), High dose quadrivalent vaccine (QIV-HD) and adjuvanted trivalent vaccine (TIV-adj) ALL protect against the flu, and the most important thing is for seniors to be vaccinated as soon as the flu vaccine is made available. Do not delay vaccination to wait for a particular product.

FluMist® (intranasal spray) is not available this year through the publicly funded flu program but is available for purchase. Please contact your pharmacy/physician for more information.

• The Ministry of Health orders the vaccine for the province of Ontario.
• The vaccine arrives at the Ministry’s central pharmacy in multiple shipments over a period of two to three months. Typically, the first shipments of flu vaccine arrive by the beginning of October.
• As the shipments come in, each Public Health Unit and pharmacy distributor receives a portion of those shipments.
• Public Health Units then send vaccine out to local health care providers. Pharmacy distributors send the flu vaccine out to the pharmacies.

High dose quadrivalent vaccine (QIV-HD) and adjuvanted trivalent vaccine (TIV-adj) is authorized onlyfor persons 65 years of age and older.

ALL age appropriate flu vaccine protect against the flu. Do not delay vaccination to wait for a particular product.

Flu vaccines do not provide protection against COVID-19 virus. Individuals are encouraged to receive their annual flu shot and any recommended COVID-19 booster doses. Visit halton.ca/COVIDvaccines to learn where you can get your COVID-19 vaccine and recommendations.

All available flu vaccines can be given at the same time as other vaccines, or at any time before or after vaccines, including COVID-19 vaccines for individuals 5 years of age and older.

For individuals 6 months to under 5 years of age, co-administration with a COVID-19 is not currently recommended. The recommendation is to wait 14 days before and after receiving a COVID-19 vaccine and other vaccines as a precaution.