Remember, you can only be infected by installing software (documents cannot infect viruses, except for rare occasions in which the document contains executable macros). And you have to analyze how people typically install software in Linux, versus how they do it in other operating systems.
OK, I see where you come from. But you don't get infected just by installing software. Anyway, if you prefer Linux it's your choice. The latest major security vulnerabilities were not on Windows though.