Another thought of concern.... People that get their flu shots early may be more immune to the one specific flu that is going around, as they have had time to build the immunities before the flu season gets well under way, but those that run out and get it after the flu season has hit hard, may be making themselves more vulnerable to the flu. When you get the shot, your immune system is temporarily weakened, and it has to build up the immunities to the strain that is in the shot. If you are exposed to the flu right after you get the vaccine, but before you have time to build up the immunities to it, you may well catch the flu faster than if you had not received the shot. (Yes a doctor even warned me this years ago) Why does this happen? Because you just killed off your body's natural immunities to the flu and are waiting for the ones from the shot to kick in.
It is my personal (and somewhat educated) opinion that, in MOST (maybe not all) cases, a strong healthy body, a good and proper diet, and ample rest on a daily basis, are the best defense for immunities to the flu. Yes, I am currently battling the flu and I DID NOT get a flu shot this year. But it is, by far, the mildest case of the flu I have ever had and my body seems to be fighting it much better this time (I always get it, flu shot or not) and much faster. The following is a great article on the subject:
Increased Flu Risk
Natural Immune System
May you have a healthy flu season!!