CD79A and infection: Fraley et al. [23] in the U.S.A, using a binding assay for the detection of IgG and IgA against the proteins S and N of SARS-CoV-2, after the application of two doses in a population of 193 individuals, among whom 42 participants had previous infections by SARS-CoV-2, reported a higher positivity rate after the first dose in those individuals with previous infections.