My son will be 6 months after thanskgiving and they want him to get his 3 shots the regular vaccines…

My son will be 6 months after thanskgiving and they want him to get his 3 shots the regular vaccines and then a fourth shot... the flu shot. Besides the fact that 4 shots seems like alot at once... is the flu shot necessary? What are your thoughts? (I'm a stay at home mom as well. Meaning my son doesn't go to day care) and never ever had the flu shot growing up and was a healthy kid.... it seems like babies are getting way to many shots these days