A 24-hour bug is not the flu.

If you had the flu, you'd know it.

People of all ages get the flu. It's simply that the rate of complications is higher among people who are in poor health generally, which elderly people disproportionately are. Same with all infectious diseases.

Here's a little something from this week's NEJM. Not related to the flu, but ought to scare the cr*p out of anyone who takes anything that's FDA-approved.