Categorize the following word into parts of speech
Virus
The word 'Virus' is a noun. It is a category of word that refers to a person, place or thing. In this context, 'Virus' refers to a type of infectious agent that can cause disease in living organisms.
Complete the following task based on the instruction and optional input provided.### Instruction:
Categorize the following word into parts of speech

### Input:
Virus

### Output:
The word 'Virus' is a noun. It is a category of word that refers to a person, place or thing. In this context, 'Virus' refers to a type of infectious agent that can cause disease in living organisms.