What smallpox is to humans — monkeypox is to animals. So what happens when a human is infected with an animal disease? WSJ explains the symptoms, reactions and treatment of a monkeypox infection. Read more about what you need to know about the 2022 monkeypox outbreak on The Wall Street Journal: https://www.wsj.com/articles/monkeypox-outbreak-symptoms-contagious-treatment-vaccine-11652984213 Illustration: Adele Morgan More from the Wall Street Journal: Visit WSJ.com: http://www.wsj.com/ Visit the WSJ Video Center: https://wsj.com/video On Facebook: https://www.facebook.com/pg/wsj/videos/ On Twitter: https://twitter.com/WSJ On Snapchat: https://on.wsj.com/2ratjSM #Monkeypox #WSJ