INDEPENDENCE DAY. On July 4, 1776, the thirteen colonies claimed their independence from England, an event which eventually led to the formation of the United States.
Polycythemia vera is a rare, chronic disorder involving the overproduction of blood cells in the bone marrow (myeloproliferation). The overproduction of red blood cells is most dramatic, but the production of white blood cells and platelets are also elevated in most cases.
Polycythemia vera is a condition characterized by an increased number of red blood cells in the bloodstream.Affected individuals may also have excess white blood cells and blood clotting cells called platelets. These extra cells cause the blood to be thicker than normal.ost cases of polycythemia vera are not inherited. This condition is associated with genetic changes that are somatic, which means they are acquired during a person's lifetime and are present only in certain cells.