Rewrite this paragraph so that it has the same meaning, is grammatically correct, and uses different vocabulary.
The man was extraordinarily ill. He had been stricken with a virus for weeks.
The individual suffered greatly from sickness caused by a prolonged viral infection.
Complete the following task based on the instruction and optional input provided.### Instruction:
Rewrite this paragraph so that it has the same meaning, is grammatically correct, and uses different vocabulary.

### Input:
The man was extraordinarily ill. He had been stricken with a virus for weeks.

### Output:
The individual suffered greatly from sickness caused by a prolonged viral infection.