Inclusion Criteria:  Must be a resident of Ontario  Arm A: Individuals aged 70 and over who can speak, read and understand English (or have a trusted individual to help with study procedures), that will receive a first or second dose of a COVID-19 vaccine at an Ontario vaccine distribution center. Individuals reaching the minimum age requirement by end of the recruitment calendar year are allowed to participate.  Arm B: Individuals between age 30-50 years who can speak, read and understand English (or have a trusted individual to help with study procedures), that will receive a first or second dose of a COVID-19 vaccine at an Ontario vaccine distribution center.  Exclusion Criteria:  Not a resident of Ontario  Individuals who are < 30 years or those 51-69 years. Those who are unable to complete the study protocols in English either alone or with the assistance of a trusted individual with an electronic device. Participants will be excluded if they enroll but do not receive any dose of the vaccine or if they have already received both doses of the vaccine prior to enrolment.