Specifically, they found the virus in hematopoietic progenitor cells (HPCs) -the mother of all immune system cells.
尤其是在定向造血干细胞(所有免疫系统细胞的母体)中找到了病毒。
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Mesoderm --- The middle germ layer in the early embryo; the source of cells that go on to make bones, muscles, connective tissue, heart, hematopoieticsystem, kidney, and other organs.