Sounds like they were careless about making sure everybody had their flu shots. When I hadn't gotten around to getting my shot as of late February, I was going to skip it this year. Then one of my classmates mentioned that she'd just gotten over it, I "got 'er done" within two days -- And of course, just this past weekend, a mild 48-hour bug came to visit!

P.S. If you're over 50, also get a shingles (zoster) vaccination, especially if you remember having had chicken pox (varicella).