What you need to bring for the third vaccination depends on the type of vaccine you are receiving. Common types of vaccines include childhood vaccines, new coronavirus vaccines, and other types of vaccines for adults. 1. Preventive vaccines for children: Hepatitis B vaccine and measles vaccine are the vaccines for children, and you need to bring the certificate of vaccination for the third vaccination. 2. New Coronavirus Vaccine: If the patient has received the new coronavirus vaccine, he/she needs to bring his/her ID card with him/her to the designated vaccination center for the third vaccination. 3. Other types of vaccines for adults: Generally there are adult hepatitis B vaccine, HPV vaccine and so on. For the third vaccination, you are usually required to bring the vaccination certificate of the previous two shots and your ID card, so that the doctor can choose the appropriate third vaccine. After receiving the third vaccination, you should pay attention to rest, eat a light diet and do not engage in strenuous activities. If you experience any discomfort after vaccination, you should go to the hospital promptly.