Rabies is contagious and is primarily transmitted through bites from infected dogs, cats, or bats. During the onset of the disease, the saliva of rabid dogs contains a high concentration of the rabies virus. Similarly, the saliva of cats in the onset phase also contains a large amount of the rabies virus. If these rabies viruses enter the human body, there is a significant risk of infection. Currently, transmission of rabies from one person to another is extremely rare; it is mainly transmitted to humans through bites from infected animals during their symptomatic phase.