So is 200 MG patients really enough to determine that it does NOT worsen MG or cause exacerbations? Afraid not in my case because it began that very evening after getting the very 1st vaccine. So call me a very rare case but don’t say it doesn’t happen or that it was from “XYZ”. I was doing very well that day and for months before that, then all my muscles started burning and I got weaker and weaker that evening until I had to go in the hospital for a week and get IVIG.