By early January, it was clear something “really, really extraordinary” was going on in Nigeria, says Lorenzo Pomarico of the Alliance for International Medical Action (ALIMA). Cases of Lassa fever, a rare viral hemorrhagic disease, were skyrocketing across the country—more were recorded in the first 2 months of this year than in all of 2017. Unprepared for a disease that has no vaccines or drugs for treatment and kills 20% to 30% of those it sickens, eight healthcare workers were infected early on and three died. “Something was going very wrong with the outbreak,” Pomarico says. Read more.