YES! If you are connected to the Internet, I would recommend an antivirus program for both Mac & PC. An antivirus is not a panacea. Be paranoid, many individuals are using social engineering to fool us into clicking things that will compromise our computer. That cute puppy picture you click may make a big mess!
There are many antivirus programs to choose from, look at the comparisons and reviews for a paid subscription. My choice is Bitdefender which protects both Mac’s and PC’s. https://www.bitdefender.com/