My brother gave me the chicken pox when I was 7 months old. My mom says I only had a few spots, but it must have been enough, because I've been exposed many times since and never gotten them again.
Had the mumps in 5th grade- it was absolutely miserable! I had weekly ice skating lessons, and after one of them, I started to feel bad. My jaw and cheeks were getting swollen, too. Told my mom that I thought I had the mumps- she told me there was no way to get them from just being in the cold rink for a day. Well, apparantly, there was someone at the rink with the mumps, because I had them! When the doctor told mom that it was the mumps, she felt awful that she didn't believe me.
Mumps are truly awful- painful, ugly, and just plain terrible! But, I got my brother back for the chicken pox- gave the mumps to him!