Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Seropositivity
Introduction
Seropositivity is the presence of a certain antibody in a blood sample. A patient with seropositivity for a particular antigen or agent is termed seropositive.
It is not a neutral term, as in popular perception seropositivity is used most commonly in reference to HIV seropositivity. It is also used (though less frequently) to refer to Rheumatoid factor.