TO GO WITH AFP STORY BY DEBORAH COLE - US billionaire philanthropist Bill Gates of the Bill & Melinda Gates Foundation is pictured at an interview with AFP in Berlin on January 27, 2015 where he attends the donor conference of the Gavi Alliance, a public-private partnership bringing vaccines to poor countries. The conference aims to mobilise an additional $7.5 billion in pledges for 2016-2020 to save up to six million lives. AFP PHOTO / TOBIAS SCHWARZ (Photo credit should read TOBIAS SCHWARZ/AFP/Getty Images)
