I'll start with Magnum's question since it's easier for me to segue from this one into OP's than the other way around.

[quote=Magic Magnum]
This reminds me of another question I have, but is close enough to this topic I'll just ask it here.What are your people's standards for calling in sick legitimately?
[/quote]

Basically, if you feel like you can't work (and I mean that you really feel miserable and know you can't be very productive), then stay home. Your work quality won't be as good and your body could probably really use a day of rest, anyway. Otherwise, though, just go work. It shouldn't be [i]that[/i] bad and so long as you're not lazy, you can get through it. Really it's just about judging whether or not you feel you're capable of working on a given day. Bring some hand sanitizer or something, though. 

There are exceptions to this, like if you're working with food or something, in which case you should probably be a bit more hesitant to work while sick, but I feel like the above rule of thumb covers most things.

If you [i]don't[/i] have any excuse, though, and you just didn't feel like getting out of bed that morning... quit being such a lazy bum. 

I mean, maybe I'm not the best person to ask, since I'm a weird little workaholic who, on multiple occasions, has tried to come to school despite really being too sick to be there, and then only left a bit later in the morning after my friends managed to convince me that I looked and felt absolutely miserable and I really needed to just go home and sleep. 

Given that piece of info about myself, my above opinions should be rather unsurprising. But, that's just what they are - my opinions.