It is not recommended to eat ice-cream immediately after the vaccination, but after 2-3 days, you can eat ice-cream and other foods as appropriate. Some people may experience nausea, vomiting, diarrhea and other uncomfortable symptoms after the vaccination, and a few patients may also experience fever, dizziness, headache and fatigue. Eating ice cream at this time may aggravate the discomfort of the gastrointestinal tract, and if consumed in excess, may cause stomach pain and stomach cramps, which may be confused with the discomfort symptoms after vaccination and make diagnosis and treatment more difficult. Therefore, it is not recommended to eat ice-cream immediately after vaccination. Vaccinators are advised to exclude the above-mentioned discomfort or wait for 2-3 days after vaccination before eating it appropriately, but they should still be careful not to consume excessive amounts to prevent such food from irritating the gastrointestinal tract and causing other discomfort. In addition to not recommending immediate consumption of ice-cream, vaccinators should also be careful to avoid cold, spicy, greasy and indigestible foods such as ice cream, cold drinks, hot pot, barbecue, seafood and fried foods, especially alcohol, which will stimulate the components of the vaccine when it enters the bloodstream and may affect the production of antibodies. In addition to this, it is also important to take rest, ensure sufficient sleep, and maintain a relaxed and happy mental state to help avoid uncomfortable reactions after vaccination.