This is the 1507th most frequent Spanish word.
virus
A microscopic infectious agent that can replicate only inside the living cells of an organism.
Here, 'virus' refers to a physical pathogen causing illness.
El virus de la gripe afecta a muchas personas cada año.
The flu virus affects many people each year.
In this context, 'virus' denotes malicious software harming a computer system.
Un virus informático dañó mi computadora hace unos días.
A computer virus damaged my computer a few days ago.
Here, 'virus' is used metaphorically to describe the rapid spread of an idea.