That, he says, is the way to study disease as well.

His post gave him the opportunity to study diseases of poverty.

That you were not in Africa to study tropical diseases?

Epidemiology is another important tool used to study disease in a population.

Dogs have long been used to study human diseases.

As part of the settlement, the industry agreed to spend $300 million to study tobacco-related disease.

But scientists said it was impossible to study diseases when no one agrees on their defining features.

The lowly weed might even be used to study human diseases and develop drugs.

The other method of studying demyelinating diseases is using animals.

In studying diseases, epidemiology faces the challenge of defining them.