sentence: Diseases are more common in older people.
sentences_before: Disease can also be caused by eating toxic or old foods. There are small germs in old foods that can cause diseases. Sometimes the germs produce chemicals or toxins which causes the disease. An example of a mutation is cancer. Living or working in an unhealthy environment can also be a cause for diseases.
concept_name: disease
headings: Disease Causes of disease
categories: Basic English 850 words