CD79A and infection: Individuals who became infected with Omicron in the future had a lower probability of a positive IgA response after the administration of the prime compared with individuals who remained infection-naive (e.g., 67% [95% CI: 57–77%] in infection-naive females compared to 44% [95% CI: 29–59%] in females infected with Omicron aged <40 years, Supplementary Table 4).