This exists. And is for sale on Amazon. The synopsis reads as such:
I was not afraid when Alex sat next to me in Mrs. Timmers’s fourth-grade class. I knew he had AIDS, but the nurse had told our class that we could not catch AIDS just by being around Alex.
What I didn’t know was how funny Alex was or how much trouble we’d get into – especially when we wrote that poem about Mrs. Zanes, the playground supervisor. Alex thought he couldn’t get in trouble because he was sick, but Mrs. Timmers sure surprised him!
After all, Alex was just Alex. And pretty soon I knew that he was going to be my best friend.