Years in public libraries had me believing my natural immunity would be enough--I'd had what I considered to be reactions to the jab a couple of times (a sore arm and a bit of a runny nose) so decided I'd not have them in the future. I got the flu in 2016 shortly after I was diagnosed (again) Wow. I was sooo sick. Any discomfort I'd had after the jab paled in comparison.
Last year my GP suggested a jab which I had a 6 weeks after chemo. No problems. I'll have another this year as my white cells are still shite and I would go well out of my way to avoid another bout of anything similar to the last one. I can understand the skepticism about flu shots but I feel too compromised to put myself at risk if there is a chance of any benefit at all. It would seem the timing is really important--too early and there is the risk of running out of immunity before the end of the flu season, too late and you might be, well, too late.
Like many matters medical, there is conflicting information if you look hard enough and conspiracy theories are not hard to find either. It's a personal choice, but I feel desperate times call for desperate measures. I'd hate to have gone through all this only to be bumped off by something I could (perhaps) have avoided.