MMR and Hepatitis A are not recommended to be vaccinated together.
MMR and Hepatitis A are two different vaccines, which can produce protective antibodies when injected into the body, and at the same time can cause localized adverse reactions at the injection site as well as related systemic side effects or allergic reactions, which may be aggravated if the two vaccines are injected at the same time.
If the two vaccines are injected at the same time, if there is an adverse reaction, it is impossible to identify the specific cause of the disease, which may affect the treatment.
Therefore, for safety reasons, it is recommended that MMR vaccine and hepatitis A vaccine should be injected separately to avoid some adverse reactions, and it is best to have an interval of one month.