Nowadays, there is always a sudden change in the weather. In the morning, it is usually bright and sunny. But in theÂ afternoon, it usually rains. This kind of weather triggers colds, coughs and flu to most kids, and to adults too. We can help our children to be less susceptible from these common illnesses by boosting their natural immune system through proper diet, physical exercise,Â and enough sleep.Â In addition, we can also give them vitamins to supplement the minerals they get from the food they eat. Remember, an ounce of prevention is worth a pound of cure.