I totally get it, and I am so sorry you guys got sick. My cousin did this to us 2 years ago while we were back home visiting family (a 27 hour drive one way). She told my dad that she wanted to see us, and that her kids had been sick but were feeling better, so we should come over. I didnt want to because I had my youngest who was under a year, and we were driving home in 3 days, I didnt want to risk getting sick. Well, she talked to my dad and convinced him and my mom that we just HAD to come over, we did. When we got there her oldest told me that her brother, who was my oldest's age, had still been sick that morning.Great. Fast forward to 2 days later and my oldest is puking everywhere. Then we leave to go home the next day and my little guy and I are puking the whole ride home. DH drove the whole way and only stopped for gas/food because he was trying to get us home so we would be comfortable (he had to get home on time for work, he was out of vacation time). DH escaped being sick because he had gotten his flu vaccine.
Worst trip of my life, and now I kind of avoid her and her family when I get home to visit, her kids are always sick with something and I really dont want to catch anything again.