Originally Posted by SamuraiBigEd
This is not entirely true, if the software uses an advanced heuristics scanner it can detect "wild" viruses and malware. Will it catch every one, no but it can reduce your risk of exposure. I have had Eset NOD32 do just this on more than a few occasions on my PC, and the files submitted turned out to be new threats.
The context was referring to just visiting a web page in the browser, not downloading a .apk. There are no known attacks of any kind like that in Android. If suddenly such a vulnerability was exploited, "antivirus" isn't going to magically protect you from it.