Scientists first isolated C auris from the ear of a Japanese patient in 2009. Between 30% and 60% of patients with invasive C auris infections die. C auris appears to evolve rapidly, with new drug-resistant strains emerging regularly. However, once C auris spreads widely in a hospital or region, it becomes extremely difficult to stop. This is why health authorities stress the need for immediate action while containing and limiting C auris remains possible.