The new coronavirus disease, COVID-19, that originated in Wuhan, China, at the end of 2019, is poised to become a global pandemic. As of February 19, 2020, more than 75,600 people around the world have contracted the disease; 2,122 people, mostly in mainland China, have died. Biotech companies like Moderna and pharma giants like Johnson & Johnson say they’re pushing hard to find a vaccine—but the discovery won’t come quickly. Here’s what we know.
