My body aches and my head is throbbing. Do I have the flu or is it just because I'm stressed or tired? Do I need a flu shot? Do I need the H1N1 vaccine, too?"
Millions of Americans will be asking themselves these and more questions this fall and winter as news reports and health care providers continue to warn about seasonal influenza and novel H1N1 influenza, otherwise known as swine flu.
The flu symptoms self-assessment tool on MayoClinic.com helps you assess whether you or your loved ones have some form of flu, or just a cold.