Abstract
The immune system of elderly individuals behaves differently from young adults, leading to a general assumption that the decline of immune system function increases the susceptibility to infectious and noninfectious diseases. This age-related internal immune function failure, termed "immune senescence," contributes to the increment of morbidity and mortality associated with diseases in elderly populations. Cord blood is considered as a source of “young” immune cells for anti-infectious immunity and adoptive cancer immunotherapy. In this review, we describe immune aging and the application of cord blood for replenishing aging immune cells against neoplastic diseases.