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letter
. 2020 Dec 27;9(1):2728–2731. doi: 10.1080/22221751.2020.1858699

Figure 1.

Figure 1.

Anti-SARS-CoV-2 IgA and IgG antibodies in breast milk and serum. (A) Breastmilk SARS-CoV-2 IgA and IgG results to N, S and RBD at 2.5 and 6.5 months after SARS-CoV-2 infection. Black columns: negative controls (breastmilk from three SARS-CoV-2 antibody-negative breastfeeding mothers). Blue columns: index case’s breastmilk sampled during July and October 2020. All breastmilk samples were diluted 1:100. (B) Serum SARS-CoV-2 IgA and IgG results. Black columns: negative controls from 25 pre-pandemic control sera taken between 2003 and 2008 or breastmilk from three SARS-CoV-2 antibody-negative breastfeeding mothers. White columns: positive control (NIBSC SARS-CoV-2 serum positive controls). Blue columns: index case’s sera sampled during July and October 2020 and serum collected from infant in October 2020. All serum samples diluted 1:100.