Simplify the following text for a Grade 7 native English-speaking person.
Original: They were married on May 29 , 1849 , and together had five children , only two of whom survived to adulthood ; the other three died of typhoid .
Simplified: Louis Pasteur and Marie were married on May 29 , 1849 , and together had five children . Only two survived to adulthood ; his other three children had died of typhoid fever .