Percentage of participants who achieve a boost response post vaccination.;SAEs post vaccination.;Serious adverse events (SAEs), medically attended adverse events (MAAEs) and any adverse events (AEs) leading to study withdrawal at any time during the study.;Solicited local and systemic reactogenicity AEs post vaccination.;Unsolicited AEs post vaccination.

Percentage of participants who achieve a boost response post vaccination.;SAEs post vaccination.;Serious adverse events (SAEs), medically attended adverse events (MAAEs) and any adverse events (AEs) leading to study withdrawal at any time during the study.;Solicited local and systemic reactogenicity AEs post vaccination.;Unsolicited AEs post vaccination.