For example, the clinical symptoms of mercury poisoning differ significantly from those of autism.

The second epidemic had no name because the symptoms differed wildly from case to case.

"Clinically, they often look alike," she adds, even though symptoms may differ markedly in the two types of patients.

Complicating matters further is the fact that symptoms of an illness in older adults can differ from those in younger people.

The specific symptom by which our body chooses to signal stress will differ from one individual to the next.

Although our symptoms differed slightly, something was making us uncomfortable.

The symptoms may differ for different patients and may experience them in their own way.

The resulting symptoms differ based on the affected area of the brain.

The symptoms associated with the various types of porphyria differ.

And the symptoms of illness may differ in different ethnic and racial groups.