👉 Seronegativity, also known as a positive or negative blood test result, refers to an abnormal finding in the body's response to infection. This can occur in response to certain infections, but it may not be recognized by the body's immune system. Seronegativities are usually classified into two categories: seroprevalent and seroreactive. Seroprevalent means that a person has an immune response to the infection but does not show symptoms of the disease; ser