I had measles in 1st grade and chicken pox in 3rd grade as a kid. It was no big deal....................
I had measles when I was 4 and my brother was 5. Mom kept us quarantined together. I think we were both pretty sick for several days, maybe 3 or 4. I remember we slept a lot, and had to have the curtains in the windows the whole day long, because the light hurt my eyes.
I didn’t get chickenpox until I was 25, and my grade school aged nephew gave it to me when I came home for Christmas. My younger sister caught them, too, so I guess neither of us had them when we were kids and mom thought we’d all had them.
About the same for me, plus a round of the mumps. Not at all unusual for kids back in the "old days".