Once a person is affected by a dengue virus, the platelets can no longer âactivateâ itself. So whenever there is damage, the platelets cannot form the mesh structure and the blood flows out of the vessel. As blood flows out, so does the platelets. This causes the platelet count to fall drastically. The blood that flows out causes internal. and external bleeding and leads to a haemorrhage.
The people of Egypt used the regular event of the River Nile flood to their advantage. Until 1970, the Nile had flooded every Spring as the mountain snows melted. This flooding of the flat land (floodplains) alongside the river enriched the soils leaving behind rich silt in which crops could be grown.
Every year in mid-July, the Nile River would rise and flood Egypt. The flood was so consistent that the ancient Egyptians knew when it would come and their prosperity depended on when the flood would come, and how much water it would yield (Feeney, 2006).he flooding of the Nile has been blamed for the sinking of two ancient cities, Eastern Canopus and Herakleion, although some argue that an earthquake was the culprit (Stanley, 2001).