In general, women who have received the New Crown vaccine can continue to breastfeed their babies. The vast majority of people who receive the New Crown vaccine do not experience significant adverse reactions and therefore do not affect breastfeeding their babies. A small number of people may experience mild discomfort such as dizziness, weakness, nausea, and vomiting after vaccination, which usually recover in about 1-3 days, and it is recommended that breastfeeding be resumed after the symptoms disappear. For those who have no adverse reactions to vaccination, they can continue to breastfeed their babies. For the few vaccinated patients who have adverse reactions, breastfeeding can be suspended and rest can be paid attention to. If you experience breast augmentation or breast swelling during this period, you can suck out the milk to avoid causing mastitis and other diseases that may affect your health or subsequent breastfeeding. The American Breastfeeding Institute recommends that breastfeeding women continue breastfeeding after receiving the new crown vaccine. According to past experience, the vaccine can stimulate the body to produce antibodies and T cells, which may passively enter breast milk, which has a strong neutralizing ability and may bring potential protection to the baby through breastfeeding. However, a professional physician should be consulted as to whether breastfeeding is possible and the specific duration of breastfeeding. After receiving the new crown vaccine, you should ensure a light diet, consume more fresh vegetables and fruits, avoid spicy, greasy and stimulating food, and get enough rest and avoid staying up late. It is recommended that breastfeeding women clean their nipples promptly after breastfeeding and suck out excess milk to prevent local bacterial growth and acute infection causing mastitis or other breast diseases, which may affect breastfeeding.