Well, you have kids, so you know - sometimes the young ones don't feel so good. And then Dad doesn't feel so good after taking care of them. :)
I finally got a flu shot a couple of weeks ago, which actually works out well. Historically, I get the flu like clockwork during the first week in March.
We actually got them back in October - we were considered high risk because of Jake's imminent arrival. (All except hubby.)