 On 22 June 2010 , the CDC announced a new test called the " CDC Influenza 2009 A ( H1N1 ) <unk> Real @-@ Time RT @-@ PCR Panel ( <unk> ) " . It uses a molecular biology technique to detect influenza A viruses and specifically the 2009 H1N1 virus . The new test will replace the previous real @-@ time RT @-@ PCR diagnostic test used during the 2009 H1N1 pandemic , which received an emergency use authorization from the U.S. Food and Drug Administration in April 2009 . Tests results are available in four hours and are 96 % accurate . 
