The first injection generally refers to the first injection of New Crown Vaccine. After the first injection of New Crown Vaccine, it is necessary to pay attention to on-site observation, observation of adverse reactions and light diet. 1. On-site observation: After the first vaccination, in order to avoid adverse reactions after vaccination, the vaccinator is required to observe the site for 30 minutes after vaccination, and can leave only if there is no special discomfort. 2. Observation of adverse reactions: after the first injection of the new crown vaccine may appear local itching, rash, hard nodules, fever, diarrhea and other adverse reactions, usually 2 to 3 days after the disappearance of their own. If there is any special discomfort, be sure to consult a doctor as soon as possible. 3. Light diet: Try to eat a light diet after the first injection of the new crown vaccine to avoid allergic reactions. It is recommended that you monitor your health and eat a light diet after the 1st dose of New Crown Vaccine.