 The work of Gunther Eysenbach, which utilized the Google Search queries , had led to the birth of Google Flu . Other than Google search engines have also been used.
<meaning-changed>  The work of Gunther Eysenbach, which utilized the Google Search queries , had led to the birth of Google Flu . Other than Google search engines have also been used.
 The work of Gunther Eysenbach, which utilized the Google Search queries , had led to the birth of Google Flu Trends, and other search engines have also been used.