The prevention or treatment of human disease by the administration of cells that have been selected, multiplied, and pharmacologically treated or altered outside the body (ex vivo), or methods (pharmacological as well as nonpharmacological) to modify the function of intrinsic cells of the body for therapeutic purposes (in vivo). NOTE: Cell therapies can be classified based on therapeutic indication, cell type, source of cells, and underlying technology, among others, in medical and regulatory contexts.

(cellular therapy) Utilization of specific cells, modified or not, for treatment of diseases. Donor lymphocyte infusion is a type of cellular therapy.