Some, including the flu vaccine are not for everyone. It can cause weird side effects other than your usual cold symptoms. It all depends on how your body reacts to it.
Some include:
Live, attenuated vaccines, Inactivated vaccines, Subunit vaccines, Toxoid vaccines, Conjugate vaccines, DNA vaccines, Recombinant vector vaccines
(I got this off a website)
It all depends on how it affects cells and how the immune system responds to it. It also depends on where you live, such as regional and the climate where you would get the vaccine
hoped this helped! :))))