(1) Fall sick and you will see who is your friend and who is not. 

(2) What if I should fall sick and not be able to work?

(3) What will happen to the business if you fall sick or die?

(4) And so, they fall sick and die, naturally.

(5) I fall sick last I get wet in the rain.

(6) If I fall sick, who is to care for the business?

(7) Those who work for themselves, and therefore can not depend on an employer, are especially vulnerable if they fall sick.

(8) Instead of dealing with the stressful situation directly, these people fall sick.

(9) Hundreds of years ago doctors noticed that if one person sick, then others would fall sick.