Methods for stabilizing blood samples, e.g., clinical blood samples, for storage or transportation before use. Exemplary applications include but are not limited to enrichment of leukocyte subtypes such as T-cells or neutrophils for cytokine and immuno-assays； isolation of progenitor cells from cord blood or peripheral blood for transplantation； isolation of fetal cells from the maternal blood for diagnosis； and sorting of circulating tumor cells for cancer detection and therapy.
