The new crown vaccine during breastfeeding, as long as the new crown vaccine approved by the state regular manufacturers can be produced. Although there is no clinical research data on the effects of vaccination with the new coronavirus vaccine on breastfeeding women, the new coronavirus vaccine in China is very safe as of now, and no serious adverse reactions have occurred. Therefore, breastfeeding women can also be safely vaccinated. 1. After vaccination, the vaccinee should stay in the vaccination unit for 30 minutes. During the period of stay, if the vaccinee has symptoms such as pale face, sweating, cold and clammy limbs, skin rash, weak pulse, cyanosis, swelling of the face and throat, and respiratory difficulties, please find a doctor of the vaccination site immediately. 2. After vaccination, you should rest more, drink more water, keep the injection site clean and hygienic, and do not wash, squeeze or massage the vaccination site to prevent local infection. 3. After vaccination, check the vaccination appointment and keep track of the next vaccination time. 4. If there is fever, local redness, swelling, pain and other reactions after vaccination, in addition to symptomatic treatment, should also promptly inform the vaccination unit doctor to make relevant records; very individual may have a high fever or persistent fever for several days or other more serious conditions, should go to the hospital in a timely manner in order to prevent delays in the condition. 5. Vaccination is one of the main measures to prevent C pneumonia, and after vaccination, we should still insist on wearing masks, washing hands frequently, and measuring body temperature and other preventive and control measures. Tip: “New coronavirus pneumonia” and “new coronavirus pneumonia” mentioned in this article were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.