Abstract: The present invention relates generally to a method of generating lymphocytes specific for particular antigens. More particularly, the present invention provides a method for generating antigen-reactive T- cells and even more particularly cytotoxic (CD8+) T-cells in 10 vitro specific for antigens such as peptide antigens. The method of the present invention enables in vitro T-cell priming for particular antigens such as antigens on cancer cells, pathogenic cells, viruses or cells infected with viruses. The present invention is useful in identifying particularly immunogenic antigens for immunotherapy. Furthermore, as a consequence, the present invention is useful in avoiding the need for expensive and time 15 consuming clinical trials.