The EBV Infection Spectrum. EBV has a particular affinity for the cells that line the mouth and throat. Once the virus inserts itself into to a specialized immune lymphocyte (B cell), it hijacks the DNA to take control of the cell forever. When cells of the mouth and throat naturally slough off, EBV is shed into saliva.
Causing the Civil War. Historically, textbooks have taught that incompatibility between northern and southern economies caused the Civil War. The industrial revolution in the North, during the first few decades of the 19th century, brought about a machine age economy that relied on wage laborers, not slaves.
However, the triggers for starting World War 2 were the invasion of Poland by Nazi Germany in 1939 and the invasion of China by Japan in 1937.This led to most nations declaring war or armed resistance against Germany, Japan and their allies. More Articles :ltimately one can say that World War 2 started because of nationalistic fervor, unresolved issues from World War I and the reaction of the United States to the expansion of the Japanese Empire in the Far East in 1930s.