what is rhesus negative
Your rhesus factor is fixed by your genes. If you're rhesus positive (RhD positive), it means that a protein (D antigen) is found on the surface of your red blood cells. If you do not have the D antigen, you will be rhesus negative (RhD negative).Most people are rhesus positive (NHS BT 2014) .our rhesus factor is fixed by your genes. If you're rhesus positive (RhD positive), it means that a protein (D antigen) is found on the surface of your red blood cells. If you do not have the D antigen, you will be rhesus negative (RhD negative).