Vets are racing to treat a 5-year-old panda diagnosed with canine distemper at the Shaanxi Rare Wildlife Rescue and Breeding Research Center.

Feng Feng, a female, has serious heart, liver, kidney and lung damage from the virus, which has killed two other pandas.

"Canine distemper is a fatal disease for pandas, with the death rate as high as 80 percent," said Wang Chengdong, director of the animal hospital at the Wolong National Nature Reserve in Sichuan province.