TABLE 2

Summary of total histopathology scores (20 points total) from H&E staining at 3 days postinfection

GroupTotal score ± SD
Young
    Naive3.0 ± 3.7
    Split vaccine7.2 ± 5.1
    H1-VLP i.m.7.0 ± 3.3
    H1-VLP i.n.3.6 ± 2.4
Aged
    Naive2.2 ± 1.3
    Split vaccine3.6 ± 2.1
    H1-VLP i.m.7.0 ± 4.6
    H1-VLP i.n.3.4 ± 2.3