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- Title
Antibodies Against SARS-CoV-2 in Human Milk: Milk Conversion Rates in the Netherlands.
- Authors
Juncker, Hannah G.; Romijn, Michelle; Loth, Veerle N.; Ruhé, Eliza J. M.; Bakker, Sjors; Kleinendorst, Saskia; de Groot, Christianne J. M.; Pajkrt, Dasja; Korosi, Aniko; van Goudoever, Johannes B.; van Gils, Marit J.; van Keulen, Britt J.
- Abstract
Background: It has been demonstrated that human milk from mothers who have been infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) contains antibodies against the virus, which could play an important role in protecting the recipient infant against coronavirus disease 2019 (COVID-19). Seroconversion is measured frequently around the world, but the milk conversion rate is unknown. Research Aims: To determine (1) the prevalence and (2) the dynamics of immunoglobulin A (IgA) antibodies against SARS-CoV-2 in human milk amongst lactating mothers in the Netherlands. Methods: In this large prospective cohort study, lactating mothers (N = 2312) were included between October 12, 2020 and February 24, 2021. Enzyme-linked immunosorbent assay was used to determine levels of IgA antibodies in human milk and immunoglobulin G (IgG) antibodies in serum against the ectodomain of the SARS-CoV-2 spike protein. Results: A total of 691 (30.6%) participants had SARS-CoV-2 specific antibodies in human milk and/or serum. Of these participants, 524 (23.1%) had IgA antibodies against SARS-CoV-2 in human milk, and 356 (15.7%) had IgG antibodies against SARS-CoV-2 in serum. A total of 199 (8.8%) participants had antibodies in both human milk and serum. SARS-CoV-2 specific IgA antibodies in human milk remain present at least 10 months after a polymerase chain reaction confirmed infection. Conclusion: The prevalence of IgA antibodies against SARS-CoV-2 in human milk was 23.1% in our cohort. This high prevalence of antibodies in human milk might lead to passive immunity in many breastfed infants and may serve as protection against COVID-19.
- Subjects
NETHERLANDS; LACTATION; MOTHERS; SARS-CoV-2; IMMUNOGLOBULINS; BREAST milk; ENZYME-linked immunosorbent assay; DISEASE prevalence; DESCRIPTIVE statistics; CHI-squared test; RESEARCH funding; POLYMERASE chain reaction; DATA analysis software; LONGITUDINAL method
- Publication
Journal of Human Lactation, 2021, Vol 37, Issue 3, p469
- ISSN
0890-3344
- Publication type
Article
- DOI
10.1177/08903344211018185