Many parents are asking how to strengthen their child’s immune system this fall, to help prevent catching colds and also the flu.  The immune system is basically a bunch of different types of cells that together fight bacteria and viruses that cause infection.   Many children get sick in the fall as they return to school and daycare where they are exposed to a variety of bugs.  Their immune systems are still growing and developing, so they are more likely to get sick than adults.  There are several factors that can influence how healthy and robust a child’s immune system is.  Follow these steps to boost your child’s immune system and help them stay healthy through this cold and flu season.