In an exclusive interview, the family of seven-year-old Sierra Jane Downing discusses her shocking struggle with the bubonic plague. Learn how she contracted this ancient disease. Plus, a reunion with the doctors that saved her life.

View Part 1 of Exclusive: The Girl Who Survived Bubonic Plague.

After years of trying to get pregnant, doctors told Kelsi Pierce it would be near impossible for her to conceive a child. However, Kelsi got the surprise of her life when her mom volunteered to be her surrogate — and she found out she, too, was pregnant!