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.
What is polycythemia vera? Polycythemia (say: polly-sigh-thee-me-ah) vera (PV) is a rare disease in which your body makes too many red blood cells.Your blood may become too thick. This causes serious health problems. PV increases the risk of abnormal blood clots, which could lead to a stroke.hat is polycythemia vera? Polycythemia (say: polly-sigh-thee-me-ah) vera (PV) is a rare disease in which your body makes too many red blood cells.