The immune system showcases a diverse array of specialized cells, each with distinct functions, capabilities, and specificities. What many may not realize is that all of these immune cells originate from a single type of cell—the hematopoietic stem cell. The normal differentiation of hematopoietic stem cells occurs in three main steps: It’s crucial to note that differentiation is a one-way street. Once a cell commits … Continue reading The Clonal Selection Hypothesis