WASHINGTON (AP) — After rallying dozens of nations to join the fight against Islamic State militants, President Barack Obama is back in the coalition-building business — this time to fight the Ebola outbreak in West Africa.

Obama is working the phones with world leaders, appealing to them via videoconference and publicly jawboning with one clear message: Stopping the deadly virus at its source is the single best way to prevent the outbreak from spreading. And that requires an infusion of additional money and resources to the hard-hit countries of Liberia, Sierra Leone and Guinea.