1. Participant is ≥ 18 years of age on the day of signing the ICF and provides written informed consent or participant is between 16 and 18 years of age and provides informed consent as well as his/her legal representative/custodial 2. Subject has been already vaccinated with Comirnaty (two doses), with the second dose having been administered within up to 6 weeks (35 days ± 7 days) before study inclusion 3. Subject understands and agrees to comply with study procedures 4. Subject must be willing to be contacted by telephone or willing to complete an eDiary during study participation

1. Participant is ≥ 18 years of age on the day of signing the ICF and provides written informed consent or participant is between 16 and 18 years of age and provides informed consent as well as his/her legal representative/custodial 2. Subject has been already vaccinated with Comirnaty (two doses), with the second dose having been administered within up to 6 weeks (35 days ± 7 days) before study inclusion 3. Subject understands and agrees to comply with study procedures 4. Subject must be willing to be contacted by telephone or willing to complete an eDiary during study participation