An Inside Look:

My mother, Cynthia L. Graham worked in a doctor's office for several years and had to test children for Sickle Cell Disease. When asked in detail about what she did, she said,

"It was horrible. We inserted a capillary tube into their finger, and the blood shot up. Then, we mixed the blood with a solution. If it separated from the solution, the child had the trait or had the disease."