Health[1] Health[1]Bacteria [2]Children's health [3]illness [4]immune system [5]Stress [6]Viruses [7]Norway [8] Forskning.no [9] High levels of stress in a family can undermine a child?s immune system, making it easier for viruses and bacteria to do their worst. Our immune system protects us from bacteria and viruses. But intense or long-lasting psychological stress can have a negative effect o...