Canine distemper is a type of highly contagious virus which affects dogs around the world. The virus is contracted by coming into contact with bodily fluids or through inhalation of aerial droplets that were in the air due to coughing and sneezing from an infected animal. Canine distemper can be fatal, especially to puppies, if it is not aggressively treated in a timely manner. A vaccine which prevents the disease is available and highly recommended for all dogs.