科学家们能够精确地告诉我们数千年前恐龙和木乃伊是如何死亡的，但当一个婴儿在接种疫苗后48小时死亡时，这突然就成了一个谜。
Scientists can tell us exactly how dinosaurs and mummies died thousands of years ago but when a baby dies 48 hours after a vaccine it’s suddenly a mystery.
科学家们能够精确地告诉我们数千年前恐龙和木乃伊是如何死亡的，但当一个婴儿在接种疫苗后48小时死亡时，这突然就成了一个谜。
Scientists can tell us exactly how dinosaurs and mummies died thousands of years ago but when a baby dies 48 hours after a vaccine it’s suddenly a mystery.