As a pediatrician, I see the best and the worst of our health care system. I see very ill children whose families cannot afford to get them the medicine or treatment they need. I see children who have not received basic preventive care and who are sicker than they should be. I see children who have untreated chronic illnesses, like asthma and diabetes, making daily life more challenging than it should be. Beginning this week, new protections created by national health reform will make health insurance start working better. The first provisions of the new law will go into effect on September...