Rabies virus enters the brain cells while polio virus attacks only the nervous system

The virus is transmitted in the saliva of an infected animal. From the point of entry (usually a bite), the rabies virus travels along nerves to the spinal cord and then to the brain, where it multiplies. From there, it travels along other nerves to the salivary glands and into the saliva.

Explanation:

answer; and he had to live thus all alone on the brink of an abyss, with no one who understood or pitied him;