When persistent joint pain strikes, the search for answers often leads to a crucial diagnostic tool: the rheumatoid factor test. This relatively quick blood analysis serves as a window into the immune ...

Rheumatoid factor (RF) is a type of antibody, an immune system protein that helps the body fight foreign substances like bacteria and viruses, called antigens. Antibodies, also known as ...

The presence of anti-CCP in a person’s blood may indicate they have rheumatoid arthritis (RA). When the immune system produces anti-CCP, it triggers a series of reactions that damage tissues in the ...