This paper reports the result of the immune response and reactions to simultaneous administration of Japanese B encephalitis vaccine, measles and hepatitis B vaccine. 215 children (0-9 months of age) were divided into three groups. Group one was vaccinated with hepatitis B vaccine alone, group two was vaccinated with Japanese B encephalitis vaccine, measles vaccine, and group three was Vaccinated with hepatitis B vaccine, Japanese B encephalitis vaccine and measles vaccine simultaneously. The result of the immune response to the combination of hepatitis B vaccine with Japanese B encephalitis vaccine were similar to that observed after immunization with each vaccine alone. But the result of the immune response to the combination of hepatitis B vaccine with measles vaccine were lower than to that observed after immunization with measles vaccine alone. The general reaction of all vaccine were mild, no significant difference between each group was noted. The study demonstrated that children can not be immunized with hepatitis B vaccine and measles vaccine simultaneously but can be immunized with hepatitis B Vaccine and Japanese B encephalitis vaccine.
