The third shot of vaccination generally refers to the third shot of the new crown vaccine, pay attention to contraindications to vaccination, stay on site after vaccination, pay attention to adverse reactions after injection, pay attention to diet, reasonable rest and other matters. The following contraindications to vaccination are not recommended: 1. Patients who are allergic to the components of the vaccine, or who have had severe allergic reactions to previous vaccinations; 2. Patients with fever suffering from acute diseases or acute exacerbation of chronic diseases; 3. women during pregnancy and lactation; 4. patients with immunodeficiency; 5. patients with new coronavirus infection or previous infection with new coronavirus, as well as patients judged unsuitable for vaccination by clinicians or vaccinators are also not allowed to be vaccinated. After vaccination, the first thing to do is to stay at the site for 30 minutes to see if there are any uncomfortable reactions in the body, such as vomiting, nausea, fever, etc. If there are no other abnormal adverse reactions, inform the doctor in time and then you can leave. Some people may have adverse reactions after the 3rd vaccination, such as redness, swelling, itching, pain, fever, diarrhea, etc. at the injection site, which usually disappears on its own in 1~2 days, but if the reaction is more serious, it is recommended to consult a doctor in time. After the 3rd vaccination, you need to pay attention to your diet, don’t eat spicy food, don’t drink strong tea, coffee, and don’t drink alcohol, and eat a light diet. In addition, you need to pay attention to reasonable rest, do not stay up late, keep enough sleep, avoid overwork. Even after vaccination, you should pay attention to minimize going to crowded places, wear a mask when you go out, and keep the room ventilated.