This is an excerpt from Spillover, with additional information added. If you never read Spillover or if it's been a while since you have, this is a great short book that tells an amazing story of a virus. Quammen is simply the best at writing about pandemics. He provides a rich history along with a solid scientific understanding of the virus in question. In this book, he focuses on Ebola. If you want to know about the many other incredibly interesting viruses waiting to infect people, I highly recommend Spillover. Quammen's writing style makes even a book about viruses a page turner.