The present invention relates to a recombinant virus of the familyParamyxoviridae comprisingan expressible polynucleotide encoding at least one of (i) a tumor antigen,(ii) a fragment of atumor antigen, and (iii) a variant of (i) or (ii). The present inventionfurther relates to apolynucleotide encoding said recombinant virus of the family Paramyxoviridaeand to a host cellcomprising said recombinant virus of the family Paramyxoviridae and/or saidpolynucleotideencoding said recombinant virus of the family Paramyxoviridae. Moreover, thepresent inventionrelates to a method for activating immune cells with antitumor activity in asample comprisingcancer cells and to further means, methods, and uses related to the presentinvention.
