I read about one or two Android security problems per day.
I've been spammed by some of my Facebook friends. They send you a message about some video, you click to see it and are taken to yuotube.com (yes, misspelled). There they tell you that you need a new version of Flash and prompt you to download. That, my friends, is the virus. I can see a lot of people falling from it. Virus writers are clever.