The invention relates to a recombinant measles virus expressing a heterologous amino acid sequence derived from an antigen of a determined RNA virus, said recombinant measles virus being capable of eliciting a humoral and/or a cellular immune response against measles virus or against said RNA virus or against both measles virus and against said RNA virus. <;??>;It also relates to the use of said recombinant measles virus for the preparation of immunogenic composition.