Puerto Rico Premature Babies

In this May 11, 2010 photo, an angel doll and list of health precautions for visitors are seen by a premature baby sleeping in the neonatal intensive care unit at The Medical Center. With nearly 20 percent of infants born before 37 weeks, Puerto Rico has the highest pre-term birth rate in the United States and one of the highest in the world. (AP Photo/Ricardo Arduengo)