1. Ailments can range from minor issues like a headache to serious conditions like cancer.

2. But recently it has been detected that the habit of smoking causes different kinds of serious physical ailments, beginning with coughing, sore throat, laryngitis, and asthma, and ending with such a fatal disease as cancer

3. It's never a good idea to let the cat out of the bag when it comes to confidential information - it can have serious consequences.

4. Pneumonia is a serious infection that affects the lungs.