Whether or not you can drink ice after vaccination should be judged on a case-by-case basis. If you are a healthy person with no digestive symptoms after vaccination, you can usually drink ice in moderation and it will not affect you or the effect of the vaccine. If adverse reactions such as diarrhea, abdominal pain, nausea and vomiting occur after vaccination, it is generally not recommended to drink iced ones to avoid aggravating the adverse reactions. In addition, if the vaccinated person suffers from coronary heart disease, chronic gastritis, chronic enteritis, hypertension and other diseases, he or she should be cautious in drinking iced ones, regardless of whether he or she is vaccinated or not, in order to avoid sudden cold stimulation leading to vascular spasm and increase in blood pressure, which may aggravate the disease or induce other complications. After vaccination, it is recommended to drink more water, room temperature water or lukewarm water, and avoid cold drinks, coffee, tea and various kinds of alcohol as much as possible. Coffee and tea can refresh the mind but are not good for sleep, and various kinds of alcohol can aggravate the adverse effects of the vaccine. Eat a light and easy-to-digest diet and avoid foods that can cause allergies, such as seafood and peanuts. You can take proper rest, avoid strenuous exercise, and pay attention to keeping the injection site dry and hygienic to avoid infection.