It should come as no surprise that some people have reactions to this vaccine.
When I was in the Army we had guys who would pass out from various vaccines, others would get sick, some would have some sort of mild reaction to them. I was one of the lucky ones who never had any reaction to them. Last year my next-door neighbor came down with the flu for 2 weeks after getting his flu shot.
I had the flu about five months ago. The major difference was my lungs were clear and I could breathe.