A number of popular commentators provide a picture of Dr Fauci and Barack Obama with the above caption, on their websites.
A simple search of Getty Images provides a number of similar pictures from 2nd December 2014. The picture is of Dr Fauci and Barack Obama in December at Vaccine Research Centre in Betheseda, Maryland with the US Secretary Health an Human Services. The meeting was relating to Ebola Research for an Ebola vaccine.
Melinda Gates was not present.