I'm constantly sick, I was on antibiotics when I was really little (For strep throat) I think over a year and a half, since they couldn't remove my tonsils until I got rid of the strep. After they finally removed them I was on antibiotics for a few more weeks, ended up ripping my stitches, almost died from bloodloss, which took a heavy toll on me, then I was on antibiotics again.
All the antibiotics ended up lowering my immune system and in the end I became sick ever few months. A simple cold ended up keeping me out of school for a week and a half.
It was one of the reasons I wanted to be homeschooled so bad.