COVID-19 / Flu
Coronavirus-19 and Influenza
The purpose of this study is to find out how often health problems occur after a COVID-19 and/or Influenza vaccine.
Location: British Columbia, Alberta, Ontario, Quebec, Nova Scotia, PEI, and Yukon Territory.
Study Summary
Study participants will receive an email 8 days and one month after they received their COVID-19 and/or Influenza vaccination inviting them to respond to a survey. Participants are asked questions regarding the occurrence of a list of signs and/or symptoms following immunization.
Total persons enrolled in study:
1217850
Both COVID-19 and Flu vaccines
COVID-19 Vaccine Only
Flu Vaccine Only
Both COVID-19 and Flu vaccines
Surveys completed:
1st Survey
surveys completed
273178
2nd Survey
surveys completed
45280
People experiencing local reaction :
57.9%
Injection site
pain/swelling/redness
Most frequent other health events reported:
4.6%
Systemic symptoms
(fever, fatigue, muscle ache, feeling unwell)
3.1%
Headache or migraine
(fever, fatigue, muscle ache, feeling unwell)
1.5%
Nausea, vomiting, diarrhea
COVID-19 Vaccine Only
Surveys completed:
1st Survey
surveys completed
273178
2nd Survey
surveys completed
45280
People experiencing local reaction :
47.4%
Injection site
pain/swelling/redness
Most frequent other health events reported:
3.9%
Systemic symptoms
(fever, fatigue, muscle ache, feeling unwell)
2.5%
Headache or migraine
(fever, fatigue, muscle ache, feeling unwell)
1.3%
Nausea, vomiting, diarrhea
Flu Vaccine Only
Surveys completed:
1st Survey
surveys completed
273178
2nd Survey
surveys completed
45280
People experiencing local reaction :
36.0%
Injection site
pain/swelling/redness
Most frequent other health events reported:
3.4%
Systemic symptoms
(fever, fatigue, muscle ache, feeling unwell)
2.3%
Headache or migraine
(fever, fatigue, muscle ache, feeling unwell)
1.2%
Nausea, vomiting, diarrhea
As with any events reports, not all symptoms reported may be caused by the vaccine. They may be coincidental and/or due to other causes.