BaalHabooze,
She had cancer. It could be that she died from a reaction to the vaccine, it could be not. But it is also the case that she was at very high risk of dying from Covid too.
I can tell you this: the vaccine isn’t killing “so many.” There might be some people that have had allergic reactions or other deadly side effects but they are extremely rare. Covid is far more likely to kill someone than an adverse reaction to the vaccine.
Anecdotally, I don’t know a single person who had a serious adverse reaction to the vaccine (the worst was sick for a few days). I know half-a-dozen people that died from Covid. And many more people have gotten the vaccine than have gotten Covid.