Misty, I have been in your position MANY times.  I have been a stay at home parent since my first child was born 9 years ago and have babysat for most of the time since then. It was always annoying before when people would bring sick children to my home, but especially since my youngest with CAH was born. I’ve had people bring their children here that had just been vomiting minutes before! And while I didnt appreciate it then, after I had the youngest, I REALLY didnt appreciate it. You’ll just have to set the rules for these parents (and children) and stick to them...you can do like a daycare center I once worked at...set absolute limits to how sick a child is before they can come to your home. You can say if they’ve vomited, had diarrhea, or very runny nose and bad cough, etc, in the past 24 hours, they arent allowed in your home, PERIOD. I know that this is hard on the working parent, and I know they cant stay home with their child every time they have a sniffle, but you have a child that can be badly affected by illness, and if you dont want sick children there, you’ll have to put your foot down. Babysitting is a hard job with very little pay, and a job that requires a LOT of patience. I’ve dealt with sooo many kids that are the ones in charge of the home. Lots of people are scared to discipline...and lots of people dont even know HOW to discipline. The best thing to do about that problem is to set the rules for your home and stick to them no matter what. If it makes you look like a "big meanie"...so be it. The main thing is to be kind to the children, but treat them like you do your own, and that includes having limits.