"NIH Retires The Last Of Its Research Chimps"

"After retiring hundreds of research chimpanzees in 2013, the NIH says 50 remaining chimps will no longer be used for medical studies.

The 50 chimpanzees were kept in case they were needed in a public health emergency, but now they will be moving into a federal sanctuary as soon as there is room.

"It's time to say we've reached the point in the U.S. where invasive research on chimpanzees is no longer something that makes sense," said Dr. Francis Collins, director of the National Institutes of Health, according to The Associated Press."

Laura Wagner reports for NPR November 19, 2015.