Let's be clear you are worried about a virus and not something you must install by choice.

"A computer virus is a computer program that can replicate itself and spread from one computer to another.[1] The term "virus" is also commonly, but erroneously, used to refer to other types of malware, including but not limited to adware and spyware programs that do not have a reproductive ability."

Since we've yet to see a virus on these, what would an antivirus do except remove money from your wallet.