 A healthy donor has given blood to make LMPBARF1EBNA-1 MABEL CTLs in the lab. We made the cells by first growing a special type of cells called activated T cells to stimulate the T cells. We then added specially produced mixtures of proteins that include the LMP, EBNA1 and BARF proteins. These were used to stimulate T cells. As the T cells grew, we added some of the healthy donor cells expressing these proteins to stimulate them. We also added a cell called K562 that has had new genes put inside it so it expresses proteins that stimulate the immune system to encourage the T cells to grow. K562 cells are cancer cells that have been treated with radiation so they cannot grow. This stimulation trains the MABEL CTLs to kill cells with EBV proteins on their surface. These cells were grown and frozen. 