CD79A and infection: Vidarsson et al. (2001) produced a unique human IgA chimeric antibody in hamster kidney cells and found that it plays an important role in preventing meningococcal infection. In addition, it has been demonstrated that the specific binding between the highly sialylated glycans of SIgA in human milk and pathogens can provide passive immunity to newborns, and protect them from the fatal infections, such as Streptococcus pneumoniae and S-fimbriated Escherichia coli (Schroten et al., 1998; Goonatilleke et al., 2019).