Well, there are virus as any kind of device that runs any logic, the thing here is that is harder to get hacked than with this kind of tools that Windows uses.
So yeah, I don’t need many apps that my Mac has and could be used to hack me with 0 click interaction or with valid Windows certified programs. Still, the “no virus” is not the only reason, updating a Linux system is just a few seconds and your work could have their own repository mirrored and monitored.