If the file has been downloaded from a virus affected source. Naturally, when we all download stuff from the internet, unknowingly, we can actually download viruses that piggy back on to files and this is how viruses can be encountered.
A virus causes an infection. It is the actual file that causes the infection. An infection itself is the action or state of the computer's security being compromised by a virus or other malware.
when you download a file that has a virus
Polio virus causes poliomyelitis.
It's the same virus that causes chicken pox - the herpes virus.
A multipartite virus is a combination of a boot sector virus and a file virus. It can hide in either type of program.
The HIV virus causes AIDS. HIV stand for Human Immunodeficiency Virus.
(1) file virus (2) boot sector virus
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The Human Immunodeficiency Virus (HIV) causes AIDS.
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West Nile Virus causes disease such as encephalopathy. The virus is carried by mosquitoes.
ISO file cannot be infected by virus