1.   Primary teachers who chat to a class depleted by flu and colds about what causes such illnesses are actually covering the curriculum.

2.   Roy believed his illness was caused by passive smoking.

3.   Stress and tension are implicated in causing illness, and I believe that much modern health propaganda simply adds to that problem.

4.   This is why the germs seldom cause serious illnesses.

5.   Her illness was caused mainly by stress.

6.   The illness is caused by a virus.

7.   Is the illness caused by bacteria or a virus?

8.   The new technique chemically changes the gene which causes the illness.

9.   The illness is caused by a defective gene and can affect all parts of the body, but the lungs are most vulnerable.

10.   The airport has denied suggestions that fumes from the Whispering Jet could cause illness.