Precautions after the third vaccination include staying at the vaccination site for 30 minutes, keeping the vaccination site dry, and eating a light diet. Due to individual differences, some vaccinated persons may have some adverse reactions after the third vaccination, such as fever, nausea, headache, and redness and swelling at the vaccination site, etc. Therefore, vaccinated persons will have a lot of things to pay attention to. 1. Stay for 30 minutes: After the third vaccination, you should stay at the vaccination site for about 30 minutes and wait for observation. During this time, if there are any signs of discomfort, such as pallor, sweating, skin rash, or difficulty breathing, then inform the doctor immediately and receive prompt treatment. 2. Keep the vaccination site dry: Keep the vaccination site dry and clean for 24 hours after the third vaccination, do not let it get wet, and avoid strenuous exercise to avoid sweating, which may cause infection. 3. Light diet: after the third injection, pay attention to dietary issues, with light food, do not smoke and drink, and do not eat cold, spicy and other stimulating food. Inoculants should also closely observe the body’s symptoms and temperature changes, if abnormal, consult a doctor in time.