As seen in Fig. 3C, the day 34 sera pool of the multimerised RBD‐S‐Dps group protected against pseudovirus infection up to a dilution of 1 : 400, whereas the monomeric RBD‐SpyT2 only showed a protective effect at a 1 : 100 dilution, and even then, it only reduced infection by  ̃ 50%. This evidence concerns the gene PDSS1 and infection.