The third dose generally refers to the third dose of the new Crown Pneumonia Vaccine, and its frequent side effects include redness, swelling, heat and pain at the vaccination site, itching, and in a few cases, fever, malaise, nausea and dizziness. So far, no serious adverse reactions have been found with the new Crown pneumonia vaccine. Redness, swelling, heat and pain at the site of inoculation are common reactions as with other vaccines, and itching and soreness at the site of inoculation may also occur. A small number of people because of weak immunity, there will be fever, fatigue, nausea, dizziness, headache, muscle pain, diarrhea, etc., usually 2-3 days after the recovery on their own, without special treatment, if there are serious adverse reactions, or adverse reactions continue for a week after the adverse reactions do not subside, you need to consult a doctor in a timely manner. It is best to receive the vaccine when the body is in a healthy state, when there is fever, nausea or in the attack period of certain diseases, the vaccination can be delayed, specific consultation with the vaccination organization. After vaccination, you should observe the vaccine for half an hour before leaving, and inform the doctor of the vaccination site if you feel unwell. If serious adverse reactions occur after returning home, return to the hospital in time to avoid adverse consequences. [Tip] This article refers to “new coronavirus pneumonia, new coronavirus pneumonia”, etc., has been December 26, 2022, the National Health Commission issued a notice to change the name to “new coronavirus infection”.