In an in-vitro study of 34 cases, the neutralizing capacity of antibodies in milk samples obtained pre- and post-SARS-COV-2 infection (with IgA and IgG antibodies) were compared; 62% of the post-infection samples compared to none of the pre-infection samples were able to neutralise antigen suggesting that these antibodies are capable of providing passive immunity [95]. This evidence concerns the gene CD79A and infection.