Now that the Boston Red Sox have moved one step closer to the World Series, teachers in Massachusetts may see more students coming down with something one mother called "Red Sox fever."

Kerri McKinnon says she used the fake ailment to get her son Brian out of school for the day so they could go to a baseball game together. She wrote a note to Brian's teacher explaining that he had a case of Red Sox fever that only a visit to the team's home -- Fenway Park -- could cure.

Brian says his teacher laughed when she read the note, but still let him spend the day with his mom. McKinnon says she hopes it was an experience her son will look back on fondly.