2021-07-20

Small-scale studies have shown that no vaccine components are found in breast milk after breastfeeding women vaccinated with mRNA vaccine

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This can alleviate the concerns of people who refuse to vaccinate or stop breastfeeding because they fear that vaccination may change breast milk. This paper was published in the Journal of Pediatrics of the American Medical Association.

Small-scale studies have shown that no vaccine components are found in breast milk after breastfeeding women vaccinated with mRNA vaccine

Research has shown that those with mRNA Vaccines can inhibit the spread of the virus that causes COVID-19. The study analyzed vaccines from Pfizer and Moderna, both of which contain mRNA.

The World Health Organization recommends that mothers who are breastfeeding be vaccinated. The Breastfeeding Medical Association stated that the risk of vaccine nanoparticles or mRNA entering the breast tissue or transferring into the milk is small.

“These results reinforce the current recommendation that mRNA vaccines are safe during lactation and breastfeeders receiving COVID vaccines should not stop breastfeeding,” the corresponding author, Assistant Professor of Maternal and Fetal Medicine at the University of California, San Francisco Stephanie L. Gaw, MD, PhD said.

“We did not detect vaccine-related mRNA in any of the tested tolerance samples,” said lead author, Dr. Yarden Golan, a postdoctoral fellow at the University of California, San Francisco. “These findings provide experimental evidence for the safety of using mRNA-based vaccines during lactation.”

The study will be conducted from December 2020 to February 2021. The average age of mothers is 37.8 years, and their children range from one month to three years old. Researchers collect their human milk samples at different times before and within 48 hours after vaccination.

The author pointed out that this study is limited by the small-scale sample, and said that further clinical data need to be obtained from a larger population to better estimate the impact of the vaccine on lactation results.

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