(CBS)- The Centers for Disease Control and Prevention wants to better track babies who pass away in their sleep. Sudden unexpected death remains a significant risk for infants and the rates have not budged over the last decade. The CDC hopes its new registry will help medical experts better track the root causes, such as unsafe sleep conditions and suffocation. _______________________________________________________________________________________________________________________ (CBS)- Many breast cancer patients are not getting enough exercise. That's according to researchers at the University of North Carolina Chapel Hill. They looked at the physical activity levels of more than 1,700 women before and after they were diagnosed with breast cancer. The study found that only 35 percent of patients got enough exercise after their diagnosis. Previous research shows exercise can prolong and improve the quality of life of breast cancer patients. _______________________________________________________________________________________________________________________ (CBS)- The CDC(Centers for Disease Control and Prevention) says vaccines that prevent rotavirus have reduced the number of children admitted to emergency rooms with diarrhea by as much as 94 percent. The study looked at hospital data before and after the vaccines were first recommended in 2006. Rotavirus is the most common cause of severe diarrhea in young children.