Vaccination during pregnancy is known to generate functional anti-spike IgG antibodies in maternal circulation that are detectable in umbilical cord blood at birth and can protect the infant from COVID-19.(4–7) Further, recent studies have demonstrated that COVID-19 infection, as well as vaccination against COVID-19, induces secretion of neutralizing SARS-CoV-2 IgA and IgG in human milk (HM).(8–16) However, little is known about the transfer of neutralizing HM antibodies to breastfeeding infants. Here, CD79A is linked to COVID-19.