Melanie's Marvelous Measles
Melanie's Marvelous Measles is a self-published children's book written by Australian author and anti-vaccine activist Stephanie Messenger. Through its story, the book claims, contrary to scientific data, that contracting measles is beneficial to health, and that vaccines are ineffective.
Source: Wikipedia — Melanie's Marvelous Measles (CC BY-SA 4.0)