According to the latest research, the antibodies produced after the new crown vaccine can be partially passed on to babies through breast milk. The research center analyzed breast milk from women who had received the new crown vaccine and found significant levels of IgA antibodies in these samples, which cannot be produced by babies themselves, so it is assumed to be passed on from breast milk. It can help protect babies against neocoronavirus pneumonia to some extent, but this is not exactly the same as vaccinating babies, and once babies stop breastfeeding, this protection disappears accordingly. In addition, China’s Technical Guidelines on Neocoronavirus Vaccination point out that breastfeeding women with a high risk of neocoronavirus infection are recommended to receive the neocoronavirus vaccine. Meanwhile, taking into account the importance of breastfeeding to the health of infants and young children as well as their nutrition, and with reference to the prevailing international practice, it is recommended that breastfeeding women continue to breastfeed their babies after they have been vaccinated with the neocoronavirus vaccine. To summarize, for breastfeeding women who are at high risk of infection, such as doctors and nurses, they can be vaccinated with the new coronary vaccine and do not need to stop breastfeeding.