What do we know about the safety of COVID-19 vaccine mRNA in breast milk?

Introduction A study by Hanna et al. published in September 2023 reported the presence of mRNA from COVID-19 mRNA vaccines in the breast milk of some lactating women[1]. This study gave rise to many social media posts questioning whether vaccine mRNA in breast milk would lead to adverse health effects in breastfeeding babies. Because pregnant and lactating mothers were initially excluded from the clinical trials that led to the COVID-19, Read More