No traces of mRNA vaccines were found in mother′s breast milk, noted a small study. 

While the beneficial antibodies may pass from mothers to infants through breast milk, the milk does not contain the mRNA itself, noted investigators in analyses of 13 breast milk samples from seven women who had been vaccinated. The findings from the study are published in JAMA Pediatrics. 

Investigators stated that more data is needed to determine the vaccines′ effect on breastfeeding. However, the results from the new study bolster the current recommendations that mRNA vaccines are safe in lactation and that lactating women who have received the COVID-19 vaccine should not stop breastfeeding, stated study coauthor Dr. Stephanie Gaw of the University of California, San Francisco… (Reuters, July 20, 2021)