It is possible to donate blood 48 hours after receiving a booster shot of the New Crown vaccine and it is beneficial to the body to do so appropriately, but there are certain groups of people who are not allowed to donate blood. It has been documented that people who have received the inactivated New Crown vaccine can donate blood after 48 hours, or after 14 days if they have received other types of New Crown vaccines, but girls need to be careful to avoid menstrual periods and the three days before and after. Appropriate blood donation can reduce blood viscosity and accelerate blood flow, making it transport nutrients and oxygen faster, thus preventing cardiovascular and cerebrovascular diseases and high blood pressure. However, those who suffer from infectious diseases such as syphilis, Hepatitis B virus infection, AIDS, Hepatitis C virus infection or abnormal liver function should be prohibited from donating blood, and in general, those who are younger than 18 or older than 55, anemic patients, and those who are underweight are also not recommended to donate blood. If you want to donate blood, it is recommended to know the precautions beforehand to ease your nerves and to donate blood in a professional place.