Whether or not you can eat beef after vaccination depends on your body type and the presence of adverse reactions to the vaccine. People who have not had any adverse reactions can eat beef in moderation, but those who have had fever, diarrhea and other adverse reactions after vaccination are generally not recommended to eat beef. Beef is mainly digested and absorbed through the gastrointestinal tract, and its consumption in moderation generally does not affect the clinical efficacy of the vaccine. If the vaccinated person is not allergic to beef and beef products, and if it is ensured that beef has not deteriorated, beef can be eaten in moderation. Beef has high nutritional value and there are certain benefits in moderate consumption, such as supplementing protein and high quality fat, which are beneficial to the body’s recovery. However, it should be cooked lightly, avoiding high oil, salt, sugar, etc., and should not be eaten more, so as not to increase the gastrointestinal burden and produce adverse effects. After eating beef, pay close attention to your condition. If you have severe nausea, vomiting, abdominal pain, diarrhea, fever and other uncomfortable symptoms, you should stop eating in time and go to the hospital if necessary. Most vaccines are live attenuated vaccines, which may cause fever, malaise, diarrhea and other adverse reactions. Beef is a hairy food and contains more protein components, which may cause adverse reactions after consumption. If you have a previous allergy to beef or suspect that beef has deteriorated, you should refrain from eating beef to avoid triggering or aggravating adverse reactions. In addition to beef, hairy foods such as mutton and leeks, seafood such as fish, shrimp and crab, and spicy and irritating foods such as chili should also be minimized.