My parents got some and what they carried wiped out almost all but a very few of their flock it was so sad. Plus, it's removed now, but it used to be on the cdc's own website regarding the polio vax and how a vax shed's to others. What the video showed was if they vaxed a child in Africa, their skin cells, etc. would shed to other children thus vaxing them. I found it at one point on youtube but they've even removed all of those. This isn't fake and it was legit by the cdc. If anyone can ever find that polio video again, share it please.