If you get a flu shot, your immune system is primed to handle the virus when it arrives. If you are one of those lucky people with a great immune system, then it whacks the virus down and you go on your merry way. Would a lucky person's great immune system whack the virus down anyway? Possibly but it might take longer and the longer it takes for the virus to be eliminated, the longer a person can be contagious.
Will a flu shot make you unable to carry the flu? No, but it will reduce the length of time you are contagious in addition to reducing the length of time of any infection.
Not everyone can get the shots but everyone can get the flu and for some people, that can be fatal. More than 30,000 people every year die of complications from the flu and hundreds of thousands are hospitalized, miss work and suffer less serious complications, like a nice case of bronchitis or walking pneumonia. All of which costs money.
So, if you want to help the economy, put less stress on our overtaxed medical systems and protect those with health problems, please get a flu shot. It WILL NOT cause the flu. Unless you are allergic to the ingredients in a vaccine, the worst you will get is a sore arm. I know people claim to get sick from the shot but study after study shows that is psychosomatic. In other words, you expect to get sick so ordinary symptoms are exaggerated and you call in sick the next day from work.
So, please get the flu shot. I haven't gotten mine yet but it is on my list near the top. Especially with my mother's iffy health, I don't want to carry it to her.