Fig. 2: Antigenic map of wild-type and mutant influenza B viruses.
From: Development of broadly protective influenza B vaccines
Viruses are depicted by circles; sera are depicted by squares. Sera generated against mutant viruses are depicted by small squares. Red, ancestral viruses; green, Victoria-lineage viruses; blue, Yamagata-lineage viruses. Mutant viruses are shown in light green (Victoria-lineage mutants) or light blue (Yamagata-lineage mutants), respectively. The two mutants selected for vaccination and challenge studies are indicated by red circles. Anti-sera generated against the two mutants are indicated by orange squares. The parent Wash/Vic and Phuket/Yam viruses are labeled and indicated by large circles in dark green or purple, respectively.
