This invention comprises: compositions comprising a derivative, plasmids, a reagent kit and methods of making these compositions a derivative, vaccine- and non-vaccine-compositions of above for causing death of cancer cells that form part of a tumour and virus infected Dengue, Measles and other diseased cells； the derivative comprising replicating as well as non-replicating derivatives of an attenuated negative stranded RNA virus belonging to family paramyxoviridae, including Measles Virus, comprising a single additional transcriptional unit carrying either only one or two or more non-viral genes, and the non-replicating derivatives being free from contaminating replicating Measles Virus (b) a Measles Virus packaging cell line for making above compositions, expressing the M, F and H proteins of MV stably. And (c) a reagent kit for producing the Measles Virus derivatives described above.
