Maternal and child outcomes reported by breastfeeding women following mRNA COVID-19 vaccination

Table of Contents Summary What’s known on this subject One published U.S. study with 31 breastfeeding women who were vaccinated with either of the two available mRNA COVID-19 vaccines found that 67% experienced any side effects after dose one and 61% after dose two of the vaccine. What this study adds More than 85% of 180 breastfeeding women who received an mRNA COVID-19 vaccine reported local or systemic symptoms, with higher frequency following the second dose. Few symptoms were reported in their breastfed children. No serious adverse events were noted. Contributors’ Statement Page Dr. Chambers and Ms. Bertrand designed the study and supervised the collection of data used in the study. Mr. Honerkamp-Smith performed the statistical analysis. All authors were involved in preparing the manuscript. All authors approved the final manuscript as submitted and agree to be accountable for all aspects of the work.