Canine distemper is a highly contagious and serious disease caused by a virus that attacks the respiratory, gastrointestinal, and, often, the nervous systems of puppies and dogs.

• 犬瘟是一种传染率高的疑难疾病，此病毒会破坏幼犬和成犬的呼吸系统、胃肠系统和神经系统。