The very first time I had the flu shot it seemed that I was sick more often than not. But with my MS, all my doctors stress the importance of getting the shot every year. MS is an auto-immune disease and the treatment lowers my immune system. With that being said, I was sick the week before thanksgiving and my primary yelled at me because I did not go to him at the first sign. He stated that I had a bacteria infection and it was going around like a wildfire. My systems resembled flu like systems except for the cough that I had.
Anyways, the last three years I have had the flu shot and have not been sick except for the time mentioned above.