Inclusion Criteria:  All subjects from study CLO-SCB-2019-001 will automatically move on to this long-term follow-up study if: 1) They have given informed consent for this follow-up study; and 2) They have completed the D184 visit of study CLO-SCB-2019-001 (ie, 6 months post the 1 st vaccination).  Exclusion Criteria:  All subjects who did not participate and completed the study or did not signed the inform consent for this follow up study.