COVID-19 / Flu
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:
350,484
Surveys completed:
57,817
People experiencing local reaction :
61.6%
Injection site
pain/swelling/redness
Most frequent other health events reported:
6.5%
Systemic symptoms
(fatigue, muscle ache, feeling unwell)
4.1%
Headache or migraine
2%
Nausea, vomiting, diarrhea
Surveys completed:
9,241
People experiencing local reaction :
58.1%
Injection site
pain/swelling/redness
Most frequent other health events reported:
6.6%
Systemic symptoms
(fatigue, muscle ache, feeling unwell)
4%
Headache or migraine
2.3%
Nausea, vomiting, diarrhea
Surveys completed:
18,863
People experiencing local reaction :
34.8%
Injection site
pain/swelling/redness
Most frequent other health events reported:
3.3%
Systemic symptoms
(fatigue, muscle ache, feeling unwell)
2.4%
Headache or migraine
1.3%
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.