1. His platelet count was only 4,000 per cubic millimeter; normal is 200,000 to 400,000 per cubic millimeter.

2. There are, on the average, an estimated 20,000 of them per cubic millimeter!

3. In a cubic millimeter of your brain, there are about 100,000 of these neurons and maybe a billion of those connections.

4. 26 Background: A diagnosis of chronic lymphocytic leukemia (CLL) requires a count of over 5000 circulating CLL-phenotype cells per cubic millimeter.

5. The CDC's definition of Aids includes: Less than 200 CD4+ T cells per cubic millimeter of blood, compared with about 1,000 CD4+ T cells for healthy people.