CD79A and COVID-19: In this context we also observed that in addition to the rs1883832 polymorphism, IgA levels on day 42 after vaccination are significantly affected by vaccination type, age, and history of COVID-19 prior to vaccination, while three months following vaccination, IgA levels are significantly affected by the type of vaccination and the exposure to SARS-CoV-2 prior or after vaccination (Table 3).