Rabies(hydrophobia) is primarily a disease of dogs and other related species. It is often transmitted to humans by the bite of a rabid or mad dog. The saliva of the dog contains the virus. The incubation period is 1 month or more. This disease attacks the central nervous system. There is no cure if the disease has one appeared.but it is possible to prevent the appearance by giving daily injections. Another disease is pneumonia. The incubation period is 1_3days. It is transmitted by contract or by air. It affects the lungs. The lungs get inflamed. There is also high fever with breathing problem and fatigue