MMR and EB vaccines should not be given together clinically, as they may affect the production of antibodies and increase the chance of adverse reactions after vaccination, at least one month apart. The MMR vaccine is a combined vaccine against mumps, measles and rubella, which can prevent the above three diseases, while the EB vaccine is mainly used for the prevention of epidemic encephalitis B. The two vaccines are live attenuated vaccines, and clinically they cannot be given together. The reason why it is not recommended to vaccinate together is that simultaneous vaccination with two live vaccines may affect each other and interfere with the production of antibodies, so that the vaccines will not only fail to perform their normal effects, but also increase the chances of the body experiencing post-vaccination adverse reactions such as fever, malaise, and rash. MMR and Hepatitis B vaccinations should be given at least 1 month apart, so please consult the vaccination center in advance and make reasonable arrangements to avoid delays.