A Study of mRNA-based Influenza and SARS-CoV-2 (COVID-19) Multi-component Vaccines in Healthy Adults

Influenza A strains included H1N1 and H3N2 and influenza B strains included Victoria-lineage and Yamagata-lineage. Antibody values reported as below LLOQ were replaced by 0.5 * LLOQ. Values greater than ULOQ were converted to ULOQ. LLOQ = 10 and ULOQ = 640 for Influenza A H1N1 and Influenza A H3N2 antibody, LLOQ = 10 and ULOQ = 320 for Influenza B/ Victoria, and LLOQ = 10 and ULOQ = 640 for Influenza B/Yamagata antibody. 95% CI was calculated based on t-distribution of log-transformed values for GM titer, then back transformed to original scale for presentation. PP Set: all randomized participants who received study drug, complied with injection schedule, complied with timings of immunogenicity blood sampling to have a Baseline and at least 1 post-injection assessment at Day 29, had no documented infection of either influenza or SARS-CoV-2 on Day 1 and up to Day 29, had no major dosing error, and had no major protocol deviations or conditions/medications that affected immune response.

SARS-CoV-2 strain included BA.4/5 and D614G antibody. Antibody values reported as below LLOQ were replaced by 0.5 * LLOQ. Values greater than ULOQ were converted to ULOQ. LLOQ = 53 and ULOQ = 71376 for SARS-CoV-2 BA.4/5 antibody and LLOQ = 74.1 and ULOQ = 184317 for SARS-CoV-2 D614G antibody. 95% CI was calculated based on t-distribution of log-transformed values for GM titer, then back transformed to original scale for presentation. PP Set: all randomized participants who received study drug, complied with injection schedule, complied with timings of immunogenicity blood sampling to have a Baseline and at least 1 post-injection assessment at Day 29, had no documented infection of either influenza or SARS-CoV-2 on Day 1 and up to Day 29, had no major dosing error, and had no major protocol deviations or conditions/medications that affected immune response.

Influenza A strains included H1N1 and H3N2 and influenza B strains included Victoria-lineage and Yamagata-lineage. Antibody values reported as below LLOQ were replaced by 0.5 * LLOQ. Values greater than ULOQ were converted to ULOQ. LLOQ = 10 and ULOQ = 640 for Influenza A H1N1 and Influenza A H3N2 antibody, LLOQ = 10 and ULOQ = 320 for Influenza B/Victoria, and LLOQ = 10 and ULOQ = 640 for Influenza B/Yamagata antibody. 95% CI was calculated based on t-distribution of log-transformed values for GMFR, then back transformed to original scale for presentation. PP Set: all randomized participants who received study drug, complied with injection schedule, complied with timings of immunogenicity blood sampling to have a Baseline and at least 1 post-injection assessment at Day 29, had no documented infection of either influenza or SARS-CoV-2 on Day 1 and up to Day 29, had no major dosing error, and had no major protocol deviations or conditions/medications that affected immune response.

SARS-CoV-2 strain included BA.4/5 and D614G antibody. Antibody values reported as below LLOQ were replaced by 0.5 * LLOQ. Values greater than ULOQ were converted to ULOQ. LLOQ = 53 and ULOQ = 71376 for SARS-CoV-2 BA.4/5 antibody and LLOQ = 74.1 and ULOQ = 184317 for SARS-CoV-2 D614G antibody. 95% CI was calculated based on t-distribution of log-transformed values for GMFR, then back transformed to original scale for presentation. PP Set: all randomized participants who received study drug, complied with injection schedule, complied with timings of immunogenicity blood sampling to have a Baseline and at least 1 post-injection assessment at Day 29, had no documented infection of either influenza or SARS-CoV-2 on Day 1 and up to Day 29, had no major dosing error, and had no major protocol deviations or conditions/medications that affected immune response.

Influenza A strains included H1N1 and H3N2 and influenza B strains included Victoria-lineage and Yamagata-lineage. Seroconversion was defined as a pre-vaccination HAI titer < 1:10 and a post-vaccination HAI titer ≥1:40 or a pre-vaccination HAI titer ≥1:10 and a minimum 4-fold rise in post vaccination HAI antibody titer. PP Set: all randomized participants who received study drug, complied with injection schedule, complied with timings of immunogenicity blood sampling to have a Baseline and at least 1 post-injection assessment at Day 29, had no documented infection of either influenza or SARS-CoV-2 on Day 1 and up to Day 29, had no major dosing error, and had no major protocol deviations or conditions/medications that affected immune response.

SARS-CoV-2 strain included BA.4/5 and D614G antibody. Seroresponse was defined as an increase from below the LLOQ to ≥4 x LLOQ if baseline nAb level was <LLOQ, or ≥4 fold rise if baseline nAb level was ≥LLOQ. PP Set: all randomized participants who received study drug, complied with injection schedule, complied with timings of immunogenicity blood sampling to have a Baseline and at least 1 post-injection assessment at Day 29, had no documented infection of either influenza or SARS-CoV-2 on Day 1 and up to Day 29, had no major dosing error, and had no major protocol deviations or conditions/medications that affected immune response.

Influenza A strains included H1N1 and H3N2 and influenza B strains included Victoria-lineage and Yamagata-lineage. Antibody values reported as below the LLOQ were replaced by 0.5 * LLOQ. Values greater than the ULOQ were converted to the ULOQ. LLOQ = 10 and ULOQ = 3620 for Influenza A H1N1 antibody, LLOQ = 10 and ULOQ = 5120 for Influenza A H3N2 antibody, LLOQ = 10 and ULOQ = 1356 for Influenza B/Victoria-lineage antibody, and LLOQ = 10 and ULOQ = 1280 for Influenza B/Yamagata-lineage antibody. 95% CI was calculated based on the t-distribution of the log-transformed values for GM titer, then back transformed to the original scale for presentation. Arms based on the applicable vaccine for this Outcome Measure.

SARS-CoV-2 strain included Omicron XBB.1.5 antibody. Antibody values reported as below the LLOQ are replaced by 0.5 * LLOQ. Values greater than the ULOQ are converted to the ULOQ. LLOQ = 38 and ULOQ = 6960 arbitrary units (AU)/milliliter (mL) for SARS-CoV-2 Omicron XBB.1.5 antibody. 95% CI was calculated based on the t-distribution of the log-transformed values for GM concentration, then back transformed to the original scale for presentation. Arms based on the applicable vaccine for this Outcome Measure.

Influenza A strains included H1N1 and H3N2 and influenza B strains included Victoria-lineage and Yamagata-lineage. Antibody values reported as below LLOQ replaced by 0.5 * LLOQ. Values greater than ULOQ converted to ULOQ. LLOQ= 10, ULOQ= 3620 for Influenza A H1N1, LLOQ= 10, ULOQ= 5120 for Influenza A H3N2, LLOQ= 10, ULOQ= 1356 for Influenza B/Victoria-lineage, and LLOQ= 10, ULOQ= 1280 for Influenza B/Yamagata-lineage. 95% CI was calculated based on t-distribution of log-transformed values for GMFR, then back transformed to original scale for presentation. PP Set: all randomized participants who received study drug, complied with injection schedule, complied with timings of immunogenicity blood sampling to have a Baseline and at least 1 post-injection assessment at Day 29, had no documented infection of either influenza or SARS-CoV-2 on Day 1 and up to Day 29, had no major dosing error, and had no major protocol deviations or conditions/medications that affected immune response.

SARS-CoV-2 strain included Omicron XBB.1.5 antibody. Antibody values reported as below the LLOQ are replaced by 0.5 * LLOQ. Values greater than the ULOQ are converted to the ULOQ. LLOQ = 38 and ULOQ = 6960 AU/mL for SARS-CoV-2 Omicron XBB.1.5 antibody. 95% CI was calculated based on the t-distribution of the log-transformed values for GMFR values, then back transformed to the original scale for presentation. PP Set: all randomized participants who received study drug, complied with injection schedule, complied with timings of immunogenicity blood sampling to have a Baseline and at least 1 post-injection assessment at Day 29, had no documented infection of either influenza or SARS-CoV-2 on Day 1 and up to Day 29, had no major dosing error, and had no major protocol deviations or conditions/medications that affected immune response.

Influenza A strains included H1N1 and H3N2 and influenza B strains included Victoria-lineage and Yamagata-lineage. Seroconversion was defined as a pre-vaccination HAI titer <1:10 and a post-vaccination HAI titer ≥1:40 or a pre-vaccination HAI titer ≥1:10 and a minimum 4-fold rise in post-vaccination HAI antibody titer. PP Set included all randomized participants who received the study intervention, complied with the injection schedule, complied with the timings of immunogenicity blood sampling to have a Baseline and at least 1 post-injection assessment at Day 29, had no documented infection of either influenza or SARS-CoV-2 on Day 1 and up to Day 29, had no major dosing error, and had no major protocol deviations or conditions/medications that affected the immune response.

SARS-CoV-2 strain included Omicron XBB.1.5 antibody. Seroresponse was defined as an increase from below the LLOQ to ≥4 * LLOQ if Baseline nAb level was < LLOQ, or ≥4-fold rise if Baseline nAb level was ≥ LLOQ. PP Set included all randomized participants who received the study intervention, complied with the injection schedule, complied with the timings of immunogenicity blood sampling to have a Baseline and at least 1 post-injection assessment at Day 29, had no documented infection of either influenza or SARS-CoV-2 on Day 1 and up to Day 29, had no major dosing error, and had no major protocol deviations or conditions/medications that affected the immune response.