Nursing mothers who are vaccinated against Covid-19 are not advised to stop breastfeeding  but they must discuss the risks  and benefits of the vaccine with their healthcare provider, within the context of their risk of contracting COVID-19 and of developing severe disease, according to the Academy of Breastfeeding Medicine (ABM).  

ABM, a worldwide organization of medical doctors dedicated to the promotion, protection, and support of breastfeeding, stated that (it) is a challenging topic because the vaccine trials excluded lactating women. Thus, there are no clinical data regarding the safety of the Pfizer/BioNtech or the Moderna vaccine in nursing mothers. According to ABM, there is little biological plausibility that the vaccine will cause harm and antibodies to SARS-CoV-2 in milk may protect the breastfeeding child.

Dr Alison Stuebe, President of ABM said that phase 3 clinical trials should routinely include pregnant and lactating participants to protect pregnant and breastfeeding individuals through research, not from research.