posted by O-Trap
Oh, I agree. I just doubt the difference is a flu vaccine, since this isn't influenza. I had read somewhere that there seemed to be differences based on blood type. Not sure how substantial that is, but it's possible.
There's a whole host of complicating factors, many of which the "average American" is guilty of at least one, and if it's multiple factors you might struggle with it:
overweight, lack of exercise, pre-diabetes, over 60, asthma, other chronic respiratory disease, smokers...and other things can weaken your immune system like bad diet, alcohol, lack of proper rest
You sort of start thinking "just let me get this and get it over with" but then you realize 15% of people get knocked on their ass bad enough to go to the hospital even if they can expect a full recovery. Although I don't know if the trigger is that you feel worse than the flu so much as the difficulty breathing forces you to the hospital.