Co-worker D had a bad bug a couple of weeks ago (respiratory - head cold, coughing, lost his voice, etc.). I came down with something similar a week later. Co-worker C starts going on about this supplement she takes, and since she started taking it she NEVER gets sick, and we should totally try it and it's only $40 a month. She said she doesn't usually go for these things (which I happen to know is a lie, but whatevs) but her husband takes it and he NEVER gets sick so she was convinced, and blah blah blah. Co-worker D was convinced by her and said he was going to start taking them.
So, guess who's sick this week (and spreading it around the office, naturally) - Co-worker C who "never" gets sick! Oh, and she says her husband is sick, too. I'm not sure I'm mean enough to call her out on the supplement B.S. about "never" getting sick... ;-)