Antibodies Against SARS-CoV-2 in Human Milk: Milk Conversion Rates in the Netherlands

Background It has been demonstrated that human milk from mothers who have infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) contains antibodies against the virus, which could play an important role in protecting recipient infant disease 2019 (COVID-19). Seroconversion is measured frequently around world, but conversion rate unknown. Research Aims To determine (1) prevalence and (2) dynamics of immunoglobulin A (IgA) SARS-CoV-2 amongst lactating Netherlands. Methods In this large prospective cohort study, ( N = 2312) were included between October 12, 2020 February 24, 2021. Enzyme-linked immunosorbent assay was used to levels IgA G (IgG) serum ectodomain spike protein. Results total 691 (30.6%) participants had specific and/or serum. Of these participants, 524 (23.1%) milk, 356 (15.7%) IgG 199 (8.8%) both remain present at least 10 months after a polymerase chain reaction confirmed infection. Conclusion The 23.1% our cohort. This high might lead passive immunity many breastfed infants may serve as protection COVID-19.