CD79A and COVID-19: Although specific antibodies were detected in the breastmilk of immunized, infected, or recovered individuals, it has been shown that breastmilk from lactating mothers infected with COVID-19 produces higher IgA, and breastmilk from lactating mothers after vaccination produces higher IgG, both of which have neutralization activity against live SARS-CoV-2 virus (22, 96, 104).