About 1 person in 1 million (so 300 americans) will possibly suffer (there is a weak link) GBS, a rare disorder where the immune system begins to attack the ner

About 1 person in 1 million (so 300 americans) will possibly suffer (there is a weak link) GBS, a rare disorder where the immune system begins to attack the nervous system. More commonly, people suffer allergic reactions (Up to a few hours later) which can be deadly. Allergic reactions aren't rare.