Nowadays, the infectious disease breaks out now

　　and then. It causes so many problems for people that a lot of people

　　can't go to school or work. What's worse, some get seriously

　　ill or even die.

　　W hat should we do to avoid being infected by the disease? .

　　First of all, we should keep good habits, such as keeping

　　clean, eating healthy food, taking enough exercise and so on.

　　Besides, we should not go to crowded places. I ask but not

　　least, if we feel uncomfortable or have a fever, we must go to

　　hospital at once for limely treatment.

　　Happiness lies first of all in health. Only in this way can

　　we live a healthy and happy life.