How long can one family be sick?

I am nearing the three week mark with only 2 days in that time frame when at least one of us wasn't sick. Its been horrid. And by the mid to end of the second week I was in full complaint mode. Boy was I sick of...sick. I do not mind snuggling my sick little ones that's not the problem. It has just gone one so long! (that's a relative statement I am sure) Actually its been more than 3 weeks. First it was Sarah whose GI issues were come and go. That resolved--sort of--and a fever ensued that got up to 105 included a trip to the ER and lasted 6 days. No sooner was she better and Timothy started in and his fever lasted 7---sibling rivalry? Had to outdo his sister? (Just kidding) The throwing up was next and this was Sarah's turn. Just yesterday--one of those 2 days mentioned above--I thought, "Wow. Finally." All were well. Then as I checked on all my little ones I find Timothy had thrown up all over in bed, on the floor, etc. (This is after I stayed up late, its 12 am and I NEED sleep.) I cleaned him up and headed to bed myself...after throwing in laundry...only to realize my own stomach was not happy. Result...Timothy and I spent the day on the couch...with a bucket nearby! I think we are both perking up since we finally had a bite to eat and I'm sipping some tea. Sandor has been away for the last 5 of this, traveling, with the exception of one evening between trips that he was home. So that's made it a bit more challenging. But I am hopeful we have reached the end and the "Meinzinger" Kid Christmas party will go ahead as planned for Friday night. It could be worse, right?