Why?

So we're three weeks into summer now and we haven't been able to do much because Cooper and I have been sick. Thankfully, I finally feel better. But Cooper's sickness is still dragging on. Mine started out as a cold. I had body aches, chills, fever, sinus pressure, and a bad cough. It lasted a week then Cooper woke up one morning covered in diarrhea and barf. It was disgusting! So the past two weeks I've been changing lots of diarrhea diapers, washing his bedding & pajamas over and over again, cleaning spots on the carpet several times, and waking up in the middle of the night with him. Earlier this week I got what Cooper got. It was the worst stomach pain I had ever had. Cooper was so worried when I threw up and I had to run to the toilet every 30 minutes it seemed like. It wasn't fun! Luckily, it only lasted a day for me. Cooper's starting to feel better. He doesn't complain of stomach pain anymore and he doesn't barf either. But his diapers are still a bit runny. The past two days his diapers were a consistency of grits so I thought he was getting better. But he woke up this morning with a big watery one again. I so wish he'll get better soon. But my question is... Why do we have to be sick in the summer time? Sickness is for winter! I want to get out and play soon. Oh diarrhea sickness, please go away soon so Cooper can have more fun! Poor kid.