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 usually doesnât cause any signs or symptoms in its early stages, but after progressing it may produce headache, shortness of breath, bleeding, dizziness, itchiness, and an enlarged spleen. The disease can also increase the likelihood of developing blood clots and stroke.