Precautions for children before taking the new crown vaccine include a light diet before vaccination, parents accompanying the vaccination, and contraindications include allergy to vaccine components, acute disease episodes, febrile periods, severe immunodeficiency, and neurological disorders. 1. Precautions: Try to eat a light diet before vaccination, do not eat stimulating spicy food, to avoid aggravating the burden on the gastrointestinal tract. Secondly, children need to be accompanied by their guardians or parents for the vaccination, and prepare the identification in advance. 2. Contraindications: Children who are allergic to the components of the new crown vaccine, who have a history of vaccination allergy and who have severe allergies after the first dose of the new crown vaccine are contraindicated from receiving the new crown vaccine. In addition, the new crown vaccine is contraindicated in children with acute disease seizures, fever or severe immunodeficiency, uncontrollable epilepsy, and so on. There are many precautions and contraindications for children before receiving the new crown vaccine, so you can consult your doctor at the hospital for details.