I'm not saying pepsi & meat & similar were the only cause, I'm saying they (and other food habits) are the overwhelming cause, as they are the most common causes of the disease and flare-ups of said disease.
Only 2. Yikes.
I don't think you see those as the warning shots they really were. Having even 1 gout flare up is a fireworks display of behavioral warning shots. It was bound to continue popping up, because it had already happened, you haven't changed your diet, and you are getting older like we all are. Gout isn't about just high uric acid levels, its about prolonged high uric acid levels. Why wouldn't it have happen again now?
I'll stop with all this now. Get better, and get off the soda!
edit: one last thing. The reason I can't get behind you deciding that the vaccine/meds were behind this particular outbreak is because its WAY more likely that your long term diet made it possible in the first place, as well as the past 2 times. If the vaccine lit the spark, you were the one who poured all the gas all over the floor in the first place. That's my general point.