I have a co-worker who mentioned that her daughter was diagnosed with PoTS (Positional Tachycardia Syndrome). It destroyed her ability to participate in cheerleading, horseback riding and karate. Two months after she shared that info, I ran across a study showing HPV vaccine can induce PoTS. I asked if her daughter had the HPV vaccine. She said yes. The PoTS occurred after the 2nd injection.
Yikes.