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. 2021 Mar 10;6(2):e00052-21. doi: 10.1128/mSphere.00052-21

TABLE 2.

Ferret neutralization titers on day 42 post-prime sera (day 14 post-boost)a

Preimmunity Vaccine Significance group Chk/pots/84 Chk/PA/04 For/57 T/64 Duk/HK/78 Sw/MO/06 Mall/MN/08
H2N2 Mal/NL/01 a 640 380 48 34 640 640 452
H2N2 Mal/WI/08 a 640 537 48 56 640 640 640
H2N2 Z1 a 640 640 134 67 640 640 640
H2N2 Z5 a 452 640 40 380 537 640 320
H2N2 Mock b 95 156 8 24 48 537 95
H3N2 Mal/NL/01 b 17 7 5 20 12 452 17
H3N2 Mal/WI/08 ab 48 67 5 28 24 640 67
H3N2 Z1 a 190 56 7 40 67 640 95
H3N2 Z5 ab 113 113 5 20 34 640 48
H3N2 Mock c 5 7 5 5 5 6 6
H1N1 Mal/NL/01 b 113 20 5 95 28 537 24
H1N1 Mal/WI/08 ab 113 40 6 537 34 640 226
H1N1 Z1 a 537 269 20 80 269 640 269
H1N1 Z5 ab 134 48 10 20 80 640 12
H1N1 Mock c 8 6 5 5 5 5 5
H3N2, H1N1 Mal/NL/01 ac 269 160 28 34 95 640 134
H3N2, H1N1 Mal/WI/08 a 113 113 10 34 67 640 134
H3N2, H1N1 Z1 c 640 380 28 160 537 640 226
H3N2, H1N1 Z5 ac 226 160 17 48 160 640 160
H3N2, H1N1 Mock b 5 5 7 5 5 6 6
H1N1, H3N2 Mal/NL/01 a 640 640 34 5 80 640 640
H1N1, H3N2 Mal/WI/08 a 537 269 40 40 80 640 380
H1N1, H3N2 Z1 a 226 640 67 113 95 640 537
H1N1, H3N2 Z5 a 269 269 20 40 113 640 190
H1N1, H3N2 Mock b 5 6 5 5 5 5 5
Mock Mal/NL/01 b 34 14 5 10 10 640 20
Mock Mal/WI/08 ab 12 17 5 5 7 640 20
Mock Z1 c 537 190 40 80 226 640 80
Mock Z5 b 160 28 6 10 56 380 14
Mock Mock a 5 5 5 5 5 5 5
a

Neutralization titers were obtained from pooled sera. Titers were obtained by taking the geometric mean titer of the replicates for each of the vaccine groups. Each column is a virus that was used in the neutralization assay. Each row is the sera from a vaccination group. The lower limit of detection is 5, while the upper limit of detection is 640. Significance group is determined for each individual preimmunity group. Within one preimmune group, the vaccines’ ability to elicit neutralization titers were compared while controlling for the main effects of virus used in the assay. Vaccination groups within a preimmunity that share a lowercase letter were not significantly different from one another.