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Indicating a positive reaction to a serological blood test, especially one testing for the presence of antibodies.
(Medicine) (of a person whose blood has been tested for a specific disease, such as AIDS) showing a serological reaction indicating the presence of the disease
se•ro•pos•i•tive(ˌsɪər oʊˈpɒz ɪ tɪv)
showing a significant level of serum antibodies, or other immunologic marker in the serum, indicating previous exposure to the infectious agent being tested.