The percentage of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H1N1 /wt A/New Caledonia/20/99 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days post Dose 1 (n=44; n=40), no major protocol violations (n=44; n=39), and had a baseline HAI titer of 4 or less (n=24; n=27).

The percentage of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H1N1 /wt A/New Caledonia/20/99 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=23; n=26), no major protocol violations (n=23; n=26), and had a baseline HAI titer of 4 or less (n=14; n=19).

The percentage of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H1N1 /ca A/New Caledonia/20/99 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days post Dose 1 (n=44; n=40), no major protocol violations (n=42; n=39), and had a baseline HAI titer of 4 or less (n=20; n=26).

The percentage of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H1N1 /ca A/New Caledonia/20/99 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=23; n=26), no major protocol violations (n=21; n=26), and had a baseline HAI titer of 4 or less (n=13; n=19).

The percentage of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H3N2 /wt A/Wisconsin/67/05 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days post Dose 1 (n=44; n=40), no major protocol violations (n=43; n=40), and had a baseline HAI titer of 4 or less (n=34; n=30).

The percentage of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H3N2 /wt A/Wisconsin/67/05 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=23; n=26), no major protocol violations (n=22; n=26), and had a baseline HAI titer of 4 or less (n=18; n=18).

The percentage of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the B /wt B/Malaysia/2506/04 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days post Dose 1 (n=44; n=40), no major protocol violations (n=44; n=37), and had a baseline HAI titer of 4 or less (n=34; n=31).

The percentage of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the B /wt B/Malaysia/2506/04 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=23; n=26), no major protocol violations (n=23; n=25), and had a baseline HAI titer of 4 or less (n=20; n=20).

The percentage of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H1N1 /wt A/Solomon Island/3/06 antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days post Dose 1 (n=44; n=40), no major protocol violations (n=43; n=39), and had a baseline HAI titer of 4 or less (n=24; n=29).

The percentage of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H1N1 /wt A/Solomon Island/3/06 antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=23; n=26), no major protocol violations (n=22; n=26), and had a baseline HAI titer of 4 or less (n=14; n=21).

The percentage of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H3N2 /wt A/Brisbane/10/2007 antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days post Dose 1 (n=44; n=40), no major protocol violations (n=43; n=40), and had a baseline HAI titer of 4 or less (n=36; n=31).

The percentage of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H3N2 /wt A/Brisbane/10/2007 antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=23; n=26), no major protocol violations (n=22; n=26), and had a baseline HAI titer of 4 or less (n=19; n=19).

The HAI GMTs of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H1N1 /wt A/New Caledonia/20/99 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days post Dose 1 (n=44; n=40), no major protocol violations (n=44; n=39), and had a baseline HAI titer of 4 or less (n=24; n=27).

The HAI GMTs of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2)for the H1N1 /wt A/New Caledonia/20/99 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=23; n=26), no major protocol violations (n=23; n=26), and had a baseline HAI titer of 4 or less (n=14; n=19).

The HAI GMTs of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H1N1 /ca A/New Caledonia/20/99 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days post Dose 1 (n=44; n=40), no major protocol violations (n=42; n=39), and had a baseline HAI titer of 4 or less (n=20; n=26).

The HAI GMTs of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H1N1 /ca A/New Caledonia/20/99 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=23; n=26), no major protocol violations (n=21; n=26), and had a baseline HAI titer of 4 or less (n=13; n=19).

The HAI GMTs of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H3N2 /wt A/Wisconsin/67/05 Influenza Strain antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days post Dose 1 (n=44; n=40), no major protocol violations (n=43; n=40), and had a baseline HAI titer of 4 or less (n=34; n=30).

The HAI GMTs of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H3N2 /wt A/Wisconsin/67/05 Influenza Strain antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=23; n=26), no major protocol violations (n=22; n=26), and had a baseline HAI titer of 4 or less (n=18; n=18).

The HAI GMTs of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the B /wt B/Malaysia/2506/04 Influenza Strain antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days post Dose 1 (n=44; n=40), no major protocol violations (n=44; n=37), and had a baseline HAI titer of 4 or less (n=34; n=31).

The HAI GMTs of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the B /wt B/Malaysia/2506/04 Influenza Strain antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=23; n=26), no major protocol violations (n=23; n=25), and had a baseline HAI titer of 4 or less (n=20; n=20).

The HAI GMTs of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H1N1 /wt A/Solomon Island/3/06 Influenza Strain antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days post Dose 1 (n=44; n=40), no major protocol violations (n=43; n=39), and had a baseline HAI titer of 4 or less (n=24; n=29)

The HAI GMTs of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H1N1 /wt A/Solomon Island/3/06 Influenza Strain antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=23; n=26), no major protocol violations (n=22; n=26), and had a baseline HAI titer of 4 or less (n=14; n=21).

The HAI GMTs of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H3N2 /wt A/Brisbane/10/2007 Influenza Strain antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days post Dose 1 (n=44; n=40), no major protocol violations (n=43; n=40), and had a baseline HAI titer of 4 or less (n=36; n=31).

The HAI GMTs of baseline seronegative subjects (baseline titer of 4 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H3N2 /wt A/Brisbane/10/2007 Influenza Strain antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=23; n=26), no major protocol violations (n=22; n=26), and had a baseline HAI titer of 4 or less (n=19; n=19).

The percentage of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H1N1 /wt A/New Caledonia/20/99 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days after Dose 1 (n=41; n=40), no major protocol violations (n=40; n=34), and had a baseline HAI titer of 10 or less (n=19; n=18).

The percentage of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H1N1 /wt A/New Caledonia/20/99 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=22; n=26), no major protocol violations (n=21; n=19), and had a baseline HAI titer of 10 or less (n=12; n=12).

The percentage of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H1N1 /ca A/New Caledonia/20/99 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days after Dose 1 (n=41; n=40), no major protocol violations (n=40; n=35), and had a baseline HAI titer of 10 or less (n=20; n=20).

The percentage of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H1N1 /ca A/New Caledonia/20/999 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=22; n=26), no major protocol violations (n=20; n=22), and had a baseline HAI titer of 10 or less (n=12; n=13).

The percentage of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H3N2 /wt A/Wisconsin/67/05 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days after Dose 1 (n=41; n=40), no major protocol violations (n=35; n=31), and had a baseline HAI titer of 10 or less (n=27; n=21).

The percentage of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H3N2 /wt A/Wisconsin/67/05 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=22; n=26), no major protocol violations (n=17; n=22), and had a baseline HAI titer of 10 or less (n=12; n=16).

The percentage of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the B /wt B/Malaysia/2506/04 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days after Dose 1 (n=41; n=40), no major protocol violations (n=30; n=27), and had a baseline HAI titer of 10 or less (n=22; n=21).

The percentage of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the B /wt B/Malaysia/2506/049 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=22; n=26), no major protocol violations (n=16; n=16), and had a baseline HAI titer of 10 or less (n=13; n=12).

The percentage of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H1N1 /wt A/Solomon Island/3/06 antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days after Dose 1 (n=41; n=40), no major protocol violations (n=16; n=14), and had a baseline HAI titer of 10 or less (n=1; n=3).

The percentage of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H1N1 /wt A/Solomon Island/3/06 antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=22; n=26), no major protocol violations (n=7; n=8), and had a baseline HAI titer of 10 or less (n=1; n=2).

The percentage of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H3N2 /wt A/Brisbane/10/2007 antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days after Dose 1 (n=41; n=40), no major protocol violations (n=7; n=12), and had a baseline HAI titer of 10 or less (n=3; n=7).

The percentage of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H3N2 /wt A/Brisbane/10/2007 antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=22; n=26), no major protocol violations (n=7; n=8), and had a baseline HAI titer of 10 or less (n=5; n=5).

The microneutralization GMTs of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H1N1 /wt A/New Caledonia/20/99 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days after Dose 1 (n=41; n=40), no major protocol violations (n=40; n=34), and had a baseline HAI titer of 10 or less (n=19; n=18).

The microneutralization GMTs of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H1N1 /wt A/New Caledonia/20/99 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=22; n=26), no major protocol violations (n=21; n=19), and had a baseline HAI titer of 10 or less (n=12; n=12).

The microneutralization GMTs of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H1N1 /ca A/New Caledonia/20/99 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days after Dose 1 (n=41; n=40), no major protocol violations (n=40; n=35), and had a baseline HAI titer of 10 or less (n=20; n=20).

The microneutralization GMTs of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H1N1 /ca A/New Caledonia/20/999 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=22; n=26), no major protocol violations (n=20; n=22), and had a baseline HAI titer of 10 or less (n=12; n=13).

The microneutralization GMTs of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H3N2 /wt A/Wisconsin/67/05 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days after Dose 1 (n=41; n=40), no major protocol violations (n=35; n=31), and had a baseline HAI titer of 10 or less (n=27; n=21).

The microneutralization GMTs of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H3N2 /wt A/Wisconsin/67/05 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=22; n=26), no major protocol violations (n=17; n=22), and had a baseline HAI titer of 10 or less (n=12; n=16).

The microneutralization GMTs of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the B /wt B/Malaysia/2506/04 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days after Dose 1 (n=41; n=40), no major protocol violations (n=30; n=27), and had a baseline HAI titer of 10 or less (n=22; n=21).

The microneutralization GMTs of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H1N1 /wt A/Solomon Island/3/06 antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days after Dose 1 (n=41; n=40), no major protocol violations (n=16; n=14), and had a baseline HAI titer of 10 or less (n=1; n=3).

The microneutralization GMTs of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the B /wt B/Malaysia/2506/049 antigenically matched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=22; n=26), no major protocol violations (n=16; n=16), and had a baseline HAI titer of 10 or less (n=13; n=12).

The microneutralization GMTs of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H1N1 /wt A/Solomon Island/3/06 antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=22; n=26), no major protocol violations (n=7; n=8), and had a baseline HAI titer of 10 or less (n=1; n=2).

The microneutralization GMTs of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 1 (28-42 days after Dose 1) for the H3N2 /wt A/Brisbane/10/2007 antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-42 days after Dose 1 (n=41; n=40), no major protocol violations (n=7; n=12), and had a baseline HAI titer of 10 or less (n=3; n=7).

The microneutralization GMTs of baseline seronegative subjects (baseline titer of 10 or less) achieving a 4 or more fold increase in titer from baseline at Post Dose 2 (28-35 days after Dose 2) for the H3N2 /wt A/Brisbane/10/2007 antigenically mismatched influenza strain

The immunogenicity (IM) population included all subjects who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had valid IM assay results obtained at baseline and at 28-35 days post Dose 2 (n=22; n=26), no major protocol violations (n=7; n=8), and had a baseline HAI titer of 10 or less (n=5; n=5).

Counts of antibody secreting cells (ASCs) per 10^6 peripheral blood mononuclear cells (PBMCs) for influenza-specific response (ie, anti-IgG fluorescein [FLU] or anti-IgA FLU) and influenza-specific response after adjusting plate background response (ie, anti-IgG FLU/anti-IgG total or anti-IgA FLU/anti-IgA total) as measured by B-cell ELISPOT assay at 7 to 10 days after Dose 1

Evaluable subjects for the ELISPOT immunogenicity included those who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had baseline data (n=30; n=35), and any protocol-specified post-dose timepoint data for B-cell ELISPOT (n=16; n=17).

Counts of antibody secreting cells (ASCs) per 10^6 peripheral blood mononuclear cells (PBMCs) for influenza-specific response (ie, anti-IgG fluorescein [FLU] or anti-IgA FLU) and influenza-specific response after adjusting plate background response (ie, anti-IgG FLU/anti-IgG total or anti-IgA FLU/anti-IgA total) as measured by B-cell ELISPOT assay at 7 to 10 days after Dose 2

Evaluable subjects for the ELISPOT immunogenicity included those who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV), had baseline data (n=30; n=35), and any protocol-specified post-dose timepoint data for B-cell ELISPOT (n=10; n=9).

Median number of PBMCs secreting interferon-gamma as measured by the number of spot forming cells per 200,000 PBMCs (SPC/2 x 10^5 PBMCs) as measured by the T-cell Elispot assay at 28 to 42 days after Dose 1. The results were summarized for wild-type (wt) influenza-specific response (wt fluorescein [FLU]) after adjusting plate background response at 28 to 42 days after Dose 1

Evaluable subjects for the ELISPOT immunogenicity included those who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV) and had valid pre-Dose 1 and post-Dose 1 T-cell Elispot results (n=12; n=15)

Median number of PBMCs secreting interferon-gamma as measured by the number of spot forming cells per 200,000 PBMCs (SPC/2 x 10^5 PBMCs) as measured by the T-cell Elispot assay at 28 to 35 days after Dose 2. The results were summarized for wild-type (wt) influenza-specific response (wt fluorescein [FLU]) after adjusting plate background response at 28 to 35 days after Dose 2

Evaluable subjects for the ELISPOT immunogenicity included those who received at least 1 full dose of study vaccine (n=50 for FluMist; n=51 for TIV) and had valid pre-Dose 1 and any post-Dose T-cell Elispot results (n=3; n=6)

Distribution of IFN-alpha/beta gene signature scores at 7 to 10 days after Dose 1. IFN alpha/beta gene signature scores were calculated as the average fold change in a panel of 21 type 1 IFN-inducible genes. The distribution of IFN alpha/beta gene signature scores ranged from -4 to 4, with -4 representing the lowest level of activity and 4 representing the highest level of activity. The percentage of subjects by IFN-alpha/beta gene signature score for each treatment group were compared.