If you watched “Little House on the Prairie,” chances are, you remember the story of Mary Ingalls.
The television show and popular book series — and maybe even a “Little House” movie in the near future — draw on the real-life experiences of Laura Ingalls Wilder. Mary, Laura’s sister, went blind as a teenager after contracting scarlet fever, according to the story. Recently, a team of medical researchers raised the question about whether that’s true.
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