Figure 1

Participant flow diagram. Abbreviations: N = number of participants; LD QIV-AS = low-dose of quadrivalent influenza vaccine adjuvanted with AS03; LD TIV-AS = low-dose of trivalent influenza vaccine adjuvanted with AS03; QIV = quadrivalent influenza vaccine; TIV = trivalent influenza vaccine; TVC = total vaccinated cohort No participants were withdrawn due to SAEs.