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What Actually Caused Mad Cow Disease

Do you remember the Mad Cow Disease scare from the 90s? What really happened? Did it go away? Join Stefan Chin for a mad new episode of SciShow and learn all about what really happened to those cows. Let's go! We're conducting a survey of our viewers! If you have time, please give us feedback: https://www.surveymonkey.com/r/SciSho... ---------- Support SciShow by becoming a patron on Patreon:   / scishow   ---------- Dooblydoo thanks go to the following Patreon supporters: D.A. Noe, Nicholas Smith, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Bella Nash, Charles Southerland, Patrick D. Ashmore, Tim Curwick, charles george, Kevin Bealer, Philippe von Bergen, Chris Peters, Fatima Iqbal ---------- Looking for SciShow elsewhere on the internet? Facebook:   / scishow   Twitter:   / scishow   Tumblr:   / scishow   Instagram:   / thescishow   ---------- Sources: http://www.oie.int/en/animal-health-i... https://www.cdc.gov/prions/bse/about.... http://www.bseinfo.org/bseclinicalsig... https://www.scientificamerican.com/ar... http://www.hopkinsmedicine.org/health... http://www.mayoclinic.org/diseases-co... https://www.fda.gov/BiologicsBloodVac... http://www.who.int/mediacentre/factsh... https://www.cdc.gov/prions/vcjd/vcjd-... https://www.cdc.gov/prions/vcjd/risk-... ---------- Images: https://en.wikipedia.org/wiki/File:Ap...