This was a notable a couple breads ago, Mystery disease has killed 116 people in the US and spread to more than 30 States
https://www.ibtimes.com/mysterious-disease-has-killed-116-people-us-spread-more-30-states-2736931
Except, its not a mystery. They figured it out in the late 50s but the CDC refuses to acknowledge it because it demonstrates a problem with their vaccine agenda. It's called provocation polio and these cases of AFM always break out in early fall, because parents wait until just before school starts to get their kids caught up on their vaccines. It was discovered by Australian researchers in the 50s that tissue injury produced by an injection (or by tonsilectomies) created a pathway to infect the body and readily journey to the spinal cord, causing paralysis.
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(14)61251-4/fulltext