Speaking to Sydney Morning Herald, Adrian Ludwig, the Android Security Chief for Google said,
"I don't think 99% plus users even get a benefit from [anti-virus]… There's certainly no reason that they need to install something in addition to [the security Android already provides]. If I were in a line of work where I need that type of protection it would make sense for me to do that. [But] do I think the average user on Android needs to install [anti-virus]? Absolutely not."
Obviously other mobile platforms are susceptible to infection, however as an open source, Android is the biggest target. Even still, perhaps users should think twice before installing (and indeed paying for) anti-virus apps. Android think they’re doing a good enough job all by themselves…
They might be a little biased though.