Figure 2.

One year comparative evaluation of anti–SARS–CoV–2 spike total Log₁₀ Ab levels (U/mL) of PINB, PIBB, PICB, NPINB, NPIBB, and NPICB groups in four sampling periods with 3–month intervals. (PINB = previously infected non booster receiver, PIBB = previously infected BioNTech booster receiver, PICB = previously infected CoronaVac booster receiver, NPINB = non–previously infected non booster receiver, NPIBB = non-previously infected BioNTech booster receiver, and NPICB = non-previously infected CoronaVac booster receiver group).