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Term Definition

The probability that a person with the disease will have a positive test result


The testing for the presence, evidence of, or quantity of antibodies specific for infectious or other agents, biochemistry, or substances in blood (serum or plasma or whole blood) 


The condition of having or not having detectable antibodies to a disease in the blood as a result of infection. Serostatus is either positive or negative. 


The probability that a person without the disease will have a negative test result


Sexually transmissible infection



Development of this site and the 2014 and 2017 revisions of the testing policies was supported by: Australian Government Department of Health and Ageing