You can drink cola after vaccination, but you should drink it as little as possible. Coke contains caffeine, which has a certain excitability. Drinking it in moderation will not have a significant effect, but drinking large amounts may not be conducive to achieving the best immune response. Other excitatory drinks, including coffee, strong tea and alcoholic beverages, should also be minimized or avoided. In addition, ice-cold cola may be irritating, especially for people with poor gastrointestinal function, and may cause stomach pain, acid reflux, diarrhea and other unpleasant symptoms, which may be confused with adverse reactions to vaccines, and is not conducive to early detection and treatment of adverse reactions. Adverse reactions such as fatigue, weakness, drowsiness, nausea and fever may sometimes occur after vaccination, but if the symptoms are mild, observation can be continued without special treatment for the time being. In case of fever, physical cooling or medication can be taken. If the symptoms are serious, it is necessary to report to the doctor and follow the doctor’s instructions for appropriate treatment. After vaccination, you should avoid strenuous exercise for a short period of time, get enough sleep, and eat a light diet with less oily, spicy and irritating foods, as well as foods that may cause allergic reactions such as seafood and river food, which are beneficial to the immunization effect of the vaccine. For some vaccines, such as the new crown vaccine and influenza vaccine, it is usually necessary to pay attention to personal protection after the vaccination, to avoid going to places where people gather, to avoid sharing utensils with others, and to wear masks correctly to help prevent infection.