Medically reviewed by Amelia MacIntyre, DO One of the most important characteristics of blood is its type. Knowing your blood ...

usually by a finger prick or by drawing blood from a vein in the arm. Then the sample is tested to determine whether you've developed antibodies against the virus that causes COVID-19. The immune ...

Esther Nkemakolam runs her fingers through kinetic sand and sings a “Moana” song as UPMC Children’s Hospital nurse Taylor Brennan gets to work drawing blood. Esther is back for her monthly blood ...