How fast does an infection spread through the human body? Use the link http://www.audible.com/lifenoggin and get a free audio book with a 30-day trial! Support Life Noggin on Patreon: https://www.patreon.com/LifeNogginStudios Follow Us! https://twitter.com/LifeNoggin https://facebook.com/LifeNoggin https://www.instagram.com/lifenoggin/ Click here to see more videos: https://www.youtube.com/user/lifenoggin Life Noggin is a weekly animated educational series. Whether it's science, pop culture, history or art, we explore it all and have a ton of fun doing it. Life Noggin Team: Director/Voice: http://lifenogg.in/patgraziosi Executive Producer: https://www.youtube.com/IanDokie Director of Marketing: http://lifenogg.in/JaredOban Animation by Steven Lawson Head Writer: http://lifenogg.in/KayleeYuhas Written by Trace Dominguez: https://twitter.com/TraceDominguez Sources: http://www.virology.ws/2014/10/08/the-incubation-period-of-a-viral-infection/ http://news.nationalgeographic.com/news/2014/07/140716-giant-viruses-science-life-evolution-origins/ http://www.nhs.uk/chq/Pages/1064.aspx?CategoryID=200& https://www.ncbi.nlm.nih.gov/pubmed/19393959 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC256119/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2715838/ https://medlineplus.gov/ency/article/003090.htm http://www.cnn.com/2009/HEALTH/10/27/cold.flu.symptoms.explainer/index.html