So everyone that does not get the shot, but does not get the flu is also breaking the chain of transmission. Just because you get the shot, does not mean that you will not get the flu. The flu shot weakens our immune systems for 2-3 weeks and if you are exposed during that time, you will likely get sick.. not just the flu, but other things that your immune system would normally handle. My daughter works as MA in a clinic and everyone of the MAs that got the flu shot got the flu. Most of those that did not get the shot, did not get the flu (it is mandatory, but you can get a waiver).
... and the flu generally does not kill anyone, it is the other stuff that gets you because you have the flu, such as Pneumonia. Older folks greatly improve their chances if they get the shots for Pneumonia.
Not wanting to debate, just wanting to present a view from other side on the flu vaccine.