I'd always heard that a vaccine has to be specifically produced to fight a specific virus. So each year is kind of a coin toss as to which flu strain will be dominant. If science gets it wrong and a different strain attacks the general public, the vaccine is pretty much worthless.
Never gotten a flu shot and as far as I know I've had the flu all of one time in my life. I spent one day where my entire body hurt and my head throbbed, then another ten days with very nasty cold symptoms.
Never gotten a flu shot and as far as I know I've had the flu all of one time in my life. I spent one day where my entire body hurt and my head throbbed, then another ten days with very nasty cold symptoms.