It&&&^s Broadcast Day in Ms. Frizzle&&&^s class. Ralphie promised everyone he&&&^d figure out what kind of show they should put on. But, Ralphie is sick and can&&&^t come to school. So, everyone climbs aboard the Magic School Bus, because if Ralphie can&&&^t come to class Ms. Frizzle&&&^s class will come to him! Join the class as they travel Ralphie&&&^s bloodstream to find out how germs make him sick and how his body can make him well again.