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They found evidence for strong positive selection on the regulatory region of the human leucocyte antigen gene HLA-DQA1 in the ancient population.

Unlike HIV, which only infects two types of immune cells, Ebola first infects the leucocytes, the white cells that patrol the blood and lymph system.

It was found that the tissues were attacked by phagocytic cells that became enlarged and carried away fragments of the tissue; the cells were subsequently identified as leucocytes or blood-cells.

Arnold represents the most strenuous advocates of the stomata theory, according to which the leucocytes pass through canals normally existing in the wall.

Simply because the red corpuscles that rule our destinies are, when dynamic, mighty breeders of hope; if the powers and principalities of darkness prevail, our guardian angels, the phagocytes, are dominated by the leucocytes.