MMR and BSE are best injected separately. MMR generally refers to the triple live attenuated measles, mumps and rubella vaccine. It is mainly used to prevent children from developing viral diseases such as epidemic measles, mumps and rubella, which are transmitted through the respiratory tract. And Encephalitis B refers to the encephalitis B vaccine, which is usually used to prevent diseases such as epidemic B encephalitis. Since MMR and B vaccine are both live attenuated vaccines, it is best to avoid administering them at the same time. This is to avoid the possibility of adverse reactions to the vaccine that are not clearly identified as being caused by the MMR or the BSE vaccine. Also, simultaneous vaccination may interfere with the production of antibodies, resulting in a decrease in the effectiveness of the vaccination. Therefore, it is better to avoid simultaneous vaccinations and to give them at intervals of 1-2 weeks or more than one month.