Is rheumatoid facotr different from rh factor?

Rh Factor: Rheumatoid factor is very different from rh, or rhesus factor. Rf represents an autoimmune process, where your body is attacking itself. Rh is the "d" antigen, which makes our blood cells either positive or negative, such as o+ or o-. If it is present on our red blood cells, we do not make antibodies against it, otherwise we would attack our own blood. But if it is neg, then we do make them.

RH Factor: Big difference. Rf, or rheumatoid factor is an autoimmune marker. Rh, or rhesus factor, relates to presence or absence of the "d" antigen on our red blood bells, and is what makes us positive or negative, as in o+ or o-.