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. 2022 May 19;14(10):2117. doi: 10.3390/nu14102117

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Change in anti-SARS-CoV-2 IgA (a) and IgG (b) levels along the simulated gastrointestinal digestion in the breast milk samples from the three study groups. In the SARS-CoV-2 infected group an aliquot at the gastric stage was not collected due to the scarce amount of sample. The horizontal dotted line indicates the cut-off value established as per pre-pandemic breast milk samples. * indicates statistically significant differences (p < 0.05) between groups of samples within each timepoint and between time points considering each group of samples (blue * for Moderna-vaccinated, green * for Pfizer vaccinated and red * for SARS-CoV-2 infected).