Serious Illness Assessment View Calculator How do you know if your child's illness is minor or serious? Children may be too young to tell you they are sick. Sometimes children don't recognize symptoms or they will ignore them. Children should have regular checkups and parents should always follow-up on their instincts that something serious may be wrong. The symptoms listed in this assessment may be signs of a serious illness. If a child has persistent symptoms, they should get medical attention immediately. Take this quick assessment to learn the symptoms of a serious illness and help you determine if your child should get medical attention. Learn more about putting this calculator or other calculators on your website.