The (Second) Deadliest Virus

Sources & further reading: This video was made possible through a grant by Open Philanthropy. Check out ’500 Million, But Not A Single One More’ by Rational Animations here: Continue learning about the fascinating world of biology with our Human Cell Poster, exclusively available here: Few of the monsters that evolution created have been so successful at hurting us as the variola virus, responsible for smallpox. The carnage it caused was so terrible and merciless that it compelled humankind, for the first time, to act truly globally. It was one of the greatest wins of our species over the ancient powers of nature, all made possible by… cows. OUR CHANNELS ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ Ger