Simplify the following text for a Grade 8 native English-speaking person.
Original: Modern scholarship is `` sharply divided '' on the subject , and it is more certain that he was plagued by malaria , particularly during the Sullan proscriptions of the 80s .
Simplified: Modern scholarship is divided on the subject . It is more certain that he was plagued by malaria , particularly during the Sullan proscriptions of the 80s .