In a direct Coombs' test a special antibody is added to a sample of blood. This test checks whether there are antibodies already bound to the surface of the red blood cell. If the test is positive the antibodies that are added bind to the antibodies on the surface of the cell.
The River Hull is a navigable river in the East Riding of Yorkshire in the north of England. It rises from a series of springs to the west of Driffield, and enters the Humber estuary at Kingston upon Hull.
The marina by the River Humber at Hull. Photo: David Simpson. Hull was originally a little settlement called Wyke which belonged to the Cistercian abbey of Meaux near Beverley. In 1293 King Edward I purchased Wyke from the abbot of Meaux and built a town here that he renamed Kingston-upon-Hull.