I have an update. As of now, my Graves' Disease is in remission. Everything returned to normal, and I no longer have to take Methimazole. It's still a wonder if my Graves' resulted from the second Pfizer Covid booster shot. I'm wondering how many others have been diagnosed with hyperthyroidism/Graves' after a booster shot and if they, too, have returned to normal after a brief treatment period. Only time will tell if the Graves' Disease will return. I am now on a schedule of returning for blood tests every few months.