Hey Audrey,
I only work with one other person at my work at all times, so as you can imagine if one person is having a bad day, the other person normally just gets to hear about it and be stuck with them for 8 hours which is all so cruel lol. I remember actually Saturday night I got stuck working with someone that was having a bad night. I got so annoyed that by 6 hours in I just sent him home and said I'd do everything by myself. So yes, I think that a persons mood can affect the way others work. Bringing your problems to work is never really a good thing to do, but I mean everyone has done it from time to time, it's only human of course.