virus

The word evokes a sense of invisible infiltration and uncontrolled replication. Whether biological or digital, the central image is an external agent that hijacks an existing system to propagate itself, often causing damage in the process. In a medical context, it carries a connotation of fragility and volatility (mutation) as well as vulnerability, since it requires a host to survive. It is used neutrally in science but often carries a tone of alarm or urgency in public health contexts. In computing, it implies a malicious, parasitic nature. While 'malware' is a broader term for any harmful software, 'virus' specifically suggests the ability to spread from one file or computer to another, mirroring the biological process.