User:STEMinfo/Adverse analytical finding draft

An adverse analytical finding (AAF), more commonly known as a positive drug test, is a report sent from a World Anti-Doping Agency (WADA)-accredited laboratory that has identified the presence of a prohibited substance and/or its metabolites or markers in a sample. When an AAF is issued, it is because an athlete's first or "A" sample showed prohibited substances. When that happens, the athlete can request to monitor a test on a stored second or "B" sample.

The number and distribution of adverse analytical findings per drug class in athletic disciplines has been analyzed, and the results indicated that little difference existed between different sports and the amount of failed tests.