Wow. Great. So you've proven that even exact statistics can't predict the outcome of a single event.
Yes, not everyone not vaccacinated will get catch a disease, yes, there are possible side effects and not everyone vaccacinated is completly immune. Which is espescially obvious as you even mention the fast mutating flu as an example.
From here on, it's statistics and personal risk analysis. I, for example, am pro-vacc, but don't get flu shots. I'm in no risk group for flu complications, I'm in no risk group for catching the flu (office worker, hardly ever in a group of people), too lazy to make an appointment so I'm not taking the (small) risk of side effects for something that not even protects for a whole flu season. (due to the named high mutation rate)
On the other hand, I got all other recommended shots. 5 or 10 years protection from even nastier diseases is worth the small side-effects-risk. (To me)
That would be completly different if I was working as teacher, cashier or whatever.
I've got a WAIS 3 combined cognitive function test score of over 180 (that's all you need to know),
Guess that's combined 3 IQ tests with a result of 60 each...