Anyone who has persistent symptoms of low blood pressure should consult a doctor. Anyone experiencing a sudden, significant drop in blood pressure should receive urgent care.

There are 10,000-20,000 white blood cells in one drop of blood, and even more when a person is ill. They are made in bone marrow. Plasma is the liquid that makes up more than half of the blood in ...

The New York Blood Center has declared a blood emergency after a 30% drop in donations in the last few weeks. It says blood, platelets and plasma are urgently needed to support patients undergoing ...