PSMD1 and infection: The M12 anti-N GMC increased after infection but not after vaccination(s) as expected (Table 2, Figure 2D,F), and was lower than the anti-S1 GMC after infection: 26.3 IU/mL (SD = 4.5) compared to 79.4 IU/mL (SD = 6.6), respectively (p < 0.001).