A method of preparing a T-cell vaccine, comprising: (a) providing a sample comprising T cells isolated from a patient; (b) contacting the T cells with patient-specific peptide mixtures, whereby the self-reactive T cells are activated; (c) expand activated autoreactive T cells; and (d) attenuate the autoreactive T cells, so that the T cells are incompetent for replication but still viable; in which the patient-specific peptide mixtures comprise peptide mixtures of MBP, PLP and MOG capable of stimulating self-reactive T cells with a stimulation index above 1.3, the stimulation index for each peptide mixture being calculated by comparing the incorporation of [3H] thymidine in a sample of patient T cells cultured in the presence of a peptide mixture comprising a part of the polypeptide, with the incorporation of [3H] thymidine in a sample of T cells cultured only in a control medium, which is expresses as the ratio of the average counts per minute of antigen aliquots / average counts per minute of the control aliquots, wherein each peptide in a mixture of peptides is 8-20 amino acids and comprises a sequence that overlaps 4- 19 amino acids with another peptide from the peptide mixture.Un método para preparar una vacuna de células T, que comprende: (a) proporcionar una muestra que comprende células T aisladas de un paciente; (b) poner en contacto las células T con mezclas peptídicas específicas del paciente, por lo que las células T autorreactivas se activan; (c) expandir las células T autorreactivas activadas; y (d) atenuar las células T autorreactivas, de forma que las células T sean incompetentes para la replicación pero aún viables; en el que las mezclas peptídicas específicas del paciente comprenden mezclas peptídicas de MBP, PLP y MOG capaces de estimular las células T autorreactivas con un índice de estimulación por encima de 1,3, calculándose el índice de estimulación para cada mezcla peptídica comparando la incorporación de [3H] timidina en una muestra de célula