CTTNBP2 and infection: To evaluate immune responses of convalescent patients with SARS 15 years post-infection, a pool of 66 short peptides that contained 9–18 amino acids and covered SARS-CoV replicase, spike, Orf3, Orf4, Orf7, Orf13, envelope, membrane, and nucleocapsid genes was synthesised (Table 3).