Complex sentence: Over the 52 years that Peel Island was an operating Lazaret over 500 patients passed though its doors, over 200 of these died, while others went into remission and eventually left the Island.
Split into simpler sentences: Over the 52 years that Peel Island was an operating Lazaret over 500 patients passed though its doors. Nearly 200 of these died, while others went into remission and eventually left the Island.