I had a similar experience, I don’t take anything.. always been more natural medicine minded, have always taken vitamins and supplements etc. for some reason decided to get the fu vaccine one year because I didn’t want to get sick while travelling. I’ve never been more sick in a year! Was sick on and off for over a year. My first, and last flu vaccine. I mean what a business model, get people sick via the thing they take to not get sick, then collect billions on over the counter cold and flu meds etc. typical, create the problem, and the solution.