Fig. 2

Epitope-specific antibody titers. Antibody titers were calculated as the difference between measurements obtained without and with competitive antibodies. The x-axis displays four regions: S1 (the Spike S1 subunit), Region A + B, Region A, and Region B (Regions A and B are detailed in Fig. 1). (A) Antibody titers in samples from virus-infected individuals. (B) Antibody titers in samples from vaccinated individuals.