inclusion criteria: - adult subjects (18 years old) having received a prime vaxzevria vaccination between 8 and 12 weeks before the screening visit - participants must provide consent indicating that he or she understands the purpose, procedures and potential risks and benefits of the study, and is willing to participate in the study. - subjects in good health or stable clinical situation. - participant is willing and able to adhere to the procedures specified in this protocol

inclusion criteria: - adult subjects (18 years old) having received a prime vaxzevria vaccination between 8 and 12 weeks before the screening visit - participants must provide consent indicating that he or she understands the purpose, procedures and potential risks and benefits of the study, and is willing to participate in the study. - subjects in good health or stable clinical situation. - participant is willing and able to adhere to the procedures specified in this protocol