An ancient virus infecting residents across Australia’s Northern Territory is leaving death and despair in its path, and doctors are now calling for greater efforts to stop the spread of infections.

Human T-lymphotropic viruses, HTLV, comprise a family of four related retroviruses that affect T-cells, a type of white blood cell. The viruses are thought to have passed from monkeys into humans, and ...

Figure 1: Map of northern Chile, showing locations of study fields from which mummy bones and blood samples of contemporary Andean people were collected (boxed area, right, enlarged at left). To ...