Twitter might have been the original source for this news (from the link at your link): From Twitter, we gather that Bill was talking about malaria prevention,

Twitter might have been the original source for this news (from the link at your link): From Twitter, we gather that Bill was talking about malaria prevention, one of the causes his Bill & Melinda Gates Foundation is pushing. "No reason that only poor people should get malaria," attendee Tara Hunt paraphrases Gates as saying.