Alcohol is not a contraindication after vaccination, but it is generally not recommended after vaccination. This is due to the influence of alcohol within wine after vaccination, which may cause the appearance of adverse reactions after vaccination or aggravate certain pathological symptoms that have already appeared. And alcohol may also affect the reaction process of immune components within the vaccine in the organism, causing certain adverse effects on the immunization effect.1. Induced adverse reactions: After vaccination, the vaccinator itself may experience certain adverse reactions, such as dizziness, headache, abdominal pain, diarrhea, fever, etc. If you drink alcohol after vaccination, alcohol will produce certain stimulation to the gastrointestinal tract, which may induce or even aggravate adverse reactions. Moreover, the vaccination may cause certain stimulation to the human immune system, leading to allergic reactions in patients who are not originally allergic to alcohol components, such as red rash and itching of the skin, which may also mask the adverse reactions after vaccination; 2. Affect the immunization effect: alcohol may affect the normal physiological processes of the liver, kidneys and even the brain, causing a certain burden to the body of the vaccinator. After vaccination, the active ingredients in the vaccine will react with the body’s immune system to help produce the corresponding antibodies, but if this process is interfered with by alcohol, it may lead to a decrease in the immune effect of the vaccine.