Stories by Rob Stein

Prospective parents can now pick embryos based on risk predictions for thousands of diseases and odds for specific traits. But should they?

Hantaviruses are usually spread by exposure to urine, saliva or feces from infected rodents, such as rats or mice. Hantavirus infections are rare but can cause deadly respiratory infections.

The pellet "definitively" links the suspect, Cole Tomas Allen, to the attack, U.S. Attorney Jeanine Pirro told CNN on Sunday.

The treatment, developed by Regeneron Pharmaceuticals, is for a very rare form of deafness. But it represents a medical milestone.

Researchers say a gene therapy allowed deaf children and adults as old as 32 to hear for the first time. The benefits have persisted for more than two years for some patients.