Visual presentation of the core epitopes of PB10, R70, and WECB2 on RiVax. HX protection categories, as defined in the Fig. 3 legend, are shown mapped onto the structure of RiVax for (A) PB10, (B) R70, and (C) WECB2. The image is color coded according to the Fig. 3 legend. The most relevant secondary structures, β-strand h and α-helix B, are labeled.