WHO released a SARS report on April 21 , 2004 .
Between November 2002 and July 2003 an outbreak of SARS in Hong Kong nearly became a pandemic , with 8,422 known infected cases and 916 confirmed human deaths ( a case-fatality rate of 10.9 % ) worldwide being listed in the World Health Organization 's ( WHO ) 21 April 2004 concluding report .
Severe acute respiratory syndrome