Influenza – the flu

Influenza is commonly referred to as the flu. It is a respiratory disease caused by a virus that affects the nose, throat and lungs. Influenza is easily passed from person to person.
  • Seasonal influenza is the annual influenza that affects people in Canada during the winter, typically between November and April.
    • You can get influenza at any time, even in summer, but it is most common in the colder months.
  • Seasonal influenza viruses change slightly from year to year.
  • Various strains of influenza virus circulate throughout the world each year and new strains can emerge and spread.
  • Most healthy people are able to recover from influenza without severe complications.
  • Antibiotics do not work against the influenza virus or any other virus. Antiviral medications may be used for treatment or prevention of influenza.

Influenza lowers the body’s ability to fight other infections. It can lead to bacterial infections, such as pneumonia, and even death especially in the elderly, children (6 to 59 months), pregnant women, indigenous people, and people with chronic medical conditions.

Alberta’s 2018 to 2019 influenza immunization program

One of the best ways to prevent seasonal influenza is through yearly immunization because the influenza virus changes each year.

Beginning October 15, Albertans 6 months of age and older are able to receive influenza vaccine, free of charge, at public health clinics and doctor’s offices. Pharmacies are also able to administer the vaccine to Albertans 5 years of age and older.


Alberta Health is offering Albertans one type of influenza vaccine free of charge. A 4-strain injectable influenza vaccine will be offered to Albertans 6 months of age and older.

Having multiple types of vaccines increases the complexity of our immunization program. Offering one type of vaccine to Albertans at mass public clinics, pharmacies and doctor’s offices means we can offer a more efficient program where vaccine is available for everyone across the province when clinics open.


FLUAD is an influenza vaccine designed to boost the immune response in seniors. This year, FLUAD will not be available at public health clinics. Seniors living in long-term care or supportive living will receive the 4-strain vaccine being offered.

  • This aligns with recommendations from the National Advisory Committee on Immunization. The committee recommends either FLUAD or a regular 4-strain vaccine for seniors.
  • Some pharmacists may choose to offer FLUAD to Albertans age 65 and older at a cost. Seniors who wish to be immunized with FLUAD can contact their pharmacies for more information.

Vaccine effectiveness

Vaccine effectiveness varies from year to year but immunization is still the best protection. We do not know how effective this year’s vaccine will be, but we do know that not being immunized offers no protection.

Influenza in Alberta facts

  • Alberta has purchased 1.6 million doses of influenza vaccine for the 2018 to 2019 season. This is enough to immunize 35% of the population.
    • Total cost: $12.6 million.
  • In 2017 to 2018, Alberta Health purchased 1.6 million doses of influenza vaccine.
    • Total cost: $12.1 million
    • 29% of Albertans (roughly 1.2 million people) received the influenza vaccine
    • 92 people died and had lab-confirmed influenza
    • 3,053 Albertans were admitted to hospital with lab-confirmed influenza
  • Alberta has offered universal influenza immunization free of charge to residents since 2009.
  • The program before 2009 targeted those most at risk of disease and complications.

Yearly influenza immunization rates

  • 2017 to 2018 – 29% (more influenza data is on the Alberta Health Services influenza website)
  • 2016 to 2017 – 27%
  • 2015 to 2016 – 27%
  • 2014 to 2015 – 30%
  • 2013 to 2014 – 27.6%
  • 2012 to 2013 – 23%
  • 2011 to 2012 – 22.5%
  • 2010 to 2011 – 22%

Every year we hope more Albertans get immunized, and we encourage all Albertans age 6 months and older to be immunized when vaccine is available.

Health care worker immunization

Health care workers are strongly encouraged to get immunized. The proportion of health care workers getting vaccinated against influenza in 2017 to 2018 was 66%, compared to 63% in 2016 to 2017.

Alberta has a voluntary immunization policy for health care workers, and are focused on education, promotion, and making it as easy as possible for health care workers to get immunized.