Figure 2

Hemagglutination inhibition (HI) antibody titers against the vaccine strains post-vaccination (PV) 1, 2 and 3. Geometric mean HI antibody titers and the standard deviation were determined 4 weeks post each vaccination. Black dotted lines indicate the detection limit (10), blue dotted lines indicate the seroprotective threshold (40). The colors of the bars are based on the HA lineage of the vaccine strains. Blue, classical swine H1 (1A.3.3.2); orange, human-like H1 (1B); green, avian-like H1 (1C); dark red, European human-like H3 (3.1970.1). TIV, Respiporc^® FLU3; BIV, GRIPORK^®; MOV, Respiporc^® FLUpan H1N1. Representative virus strains that are genetically closely related to the vaccine strains were used in the HI assay (Figure 1).