Sarah Murnaghan, the 10-year-old Pennsylvania girl at the center of the controversy over lung-transplant rules, has suffered a major setback -- she has pneumonia.

Her mother, Janet Murnaghan, says doctors told her that the pneumonia was likely caused by breathing in stomach contents. Sarah appears to be responding to antibiotics but still requires breathing support from a ventilator.

Sarah received a pair of adult lungs on June 12th, but those failed to work properly. She got another set on June 15th. Until those procedures, her parents had been fighting to allow children younger than 12 to get priority status on adult transplant lists. Their efforts brought about a one-year change in the policy.

Source: Philadelphia Inquirer