Drinking alcohol the day before the vaccination may have an effect because the alcohol content may reduce the effectiveness of the vaccine and increase the risk of adverse reactions, so it is recommended to delay the vaccination. Alcohol metabolism usually takes 24-48 hours, so if you drink alcohol the day before you get the vaccine, you may still have unmetabolized alcohol in your body, which may reduce the effectiveness of the vaccine or affect the body’s absorption of the vaccine and cause adverse reactions. Therefore, if you drink alcohol the day before the vaccination, you can postpone the vaccination, or you can drink more water before the injection to accelerate the metabolism of alcohol. If you drink alcohol the day before the New Crown vaccine and you have already received the New Crown vaccine, there is no need to worry too much. The effect of alcohol on the effectiveness and adverse reactions of the New Crown vaccine is very limited and is also related to the amount of alcohol consumed. It is sufficient to observe closely after the New Crown vaccination and if adverse reactions occur they can be treated as soon as possible and, if necessary, with medical attention. Usually a light diet is recommended for a short period of time before and after any vaccination, to ensure balanced nutrition and adequate rest, and one should not drink alcohol or eat stimulating foods such as too spicy or cold.