I got a virus on my iPad last night. I discovered that it had infected when I started receiving non-delivery messages. I don't believe my PC was on, but that is not clear. My wife had been using my PC earlier in the day, and left in the sleep mode on her own user partition. This virus was characterized by sending a brief 2-line message with a link to a Canadian drug firm selling something like Viagara to EVERY address in my address book. Has anyone else experienced this? Is there antivirus app for iPad?