In a laboratory on Galveston Island, Tom Geisbert is working overtime. The pressure is on as the biggest Ebola epidemic in history creeps across West Africa, jumping over borders and permeating cells. The virus has killed more than 1,000 people. For Geisbert, three decades of scientific grunt work — hours of pipetting and disinfecting and note-taking and grant-writing — are thrust into the limelight. The public demands a cure.