They are present in approximately 60 to 80 percent of people diagnosed with RA. Studies have found that, for many people, the antibodies precede the development of clinical symptoms by 5 to 10 years. If you have symptoms consistent with RA and a positive test for the antibody, an RA diagnosis is almost a certainty.Previously, seropositivity was defined in terms of an antibody called rheumatoid factor (RF).tudies have found that, for many people, the antibodies precede the development of clinical symptoms by 5 to 10 years. If you have symptoms consistent with RA and a positive test for the antibody, an RA diagnosis is almost a certainty.
Blood can be separated into two major components: Formed elements and Plasma. i. Blood cells or formed elements (about 45% of blood), which is composed mainly of. red blood cells (RBC) i.e. 99% of blood cells are RBC and the other 1% is white blood.
Your blood is made of white blood cells, red blood cells,  platelets, and plasma.   The white blood cells fight infections and are part of the body's  immune system.aguely speaking, human blood is composed of blood cells, plasma, and platelets More specifically, Human blood has about 45% blood cells and 55 percent plasma. The blood cel â¦ ls contain erythrocytes(red blood cells) and leukocytes(white blood cells), but it's mostly red blood cells.