yunion, to the Linux Community of Blleping Computer Forums!
We're happy to have you here & have chosen our community to be a part of.
As far a security for Linux goes, as all of the commenters has stated, there's no such thing as a bulletproof OS, unless it's not booted & power cord removed (to prevent network booting). Intel & AMD CPU's has a way to do this, don't know what it's called on AMD, with Intel, it's now vPro, that has been renamed 2-3 times, began in at least the early Vista years, was once called AMT (though went through several revisions. For more, I've supplied a link below. While at the last page for AMD, if interested you can access the entire article.
So if you were to have an OEM computer, even w/out Windows installed, Dell, HP, IBM/Lenovo & others can still deliver firmware updates by using Intel vPro. Believe it's called DASH on AMD CPU's, though an open standard.
Have been running Linux Mint for 7 straight years, beginning with Mint 7 or Gloria, and have never been infected. Though am positive have picked up browser objects that could had been passed onto Windows computers on the same network. In other words, just because our OS's typically doesn't become infected, we can be spewing these all over the place. This is how infections spreads, from the network. The OS doesn't matter.
Fortunately, one can clean their browser easily with a number of tools, including the ones with the browser. I use 'Click & Clean' with Google Chrome, and other browser extensions, such as uBlock Origin, Adblock Plus, Avira Browser Safety for active protection, and Bitdefender Traffic Light to warn of Malware loaded sites, this allows me to close the tab safely. Not that any of these will harm my browsing experience or infect my OS, it's just very useful to still use an adblocker, of which ads are fighting for the same bandwidth as the content we desire to view.
The others plays a part in keeping Malware away from the browser, if it doesn't reach it, then we can redistribute across the neighborhood, cable Internet is bad for this, someone across the other side of the city can become infected, and can spread to the other side within a couple of minutes. With Windows, one has to have decent browser & computer security, as well as check the router to optimize settings (good for Linux users also) to stay secure, and it's becomes a chore to run the computer, rather than pleasure, because it's scan, scan & scan more. It's best (daily if used) when running Windows to click onto the C drive & other Windows partitions, and scan each with Malwarebytes once weekly, which even on a fast SSD takes up to an hour. BTW, it's good maintenance to run AdwCleaner once per week on any Windows install, as well as a Custom scan with Emsisoft Emergency Kit, and quarantine anything found.
With Linux, none of this hard, tiring is needed & we can enjoy the OS, rather than be deciding which tool to check the OS with on a given day. It has to be one or the other, or become standing in our 'Am I Infected' line, daily manual scanning is not an option, rather a must. You'd be surprised at what you'll find that your installed security didn't catch.
Good Luck with Linux, I feel that you'll find it plenty enough safe for your needs, w/out working 3 hours out of a 4 hour browsing session performing various scans.