As the ACA is implemented, millions more immigrants will have access to health coverage, as will uninsured low-income Americans. Left behind will be undocumented immigrants and those in families where some people are citizens and some are undocumented. The story looks at the human toll of our fractured healthcare and immigration systems, as well as the financial costs to all of us. Written piece accompanied by video and audio pieces produced by Megan Burks at KPBS.org.