The Cabir mobile phone virus was reported to be spreading at the Athletics World Championships, held in Helsinki this month. Cabir infects phones running the Symbian Series 60 operating system, and spreads via Bluetooth connections. Apart from draining the batteries of the infected phones, Cabir does no damage.
Users need to accept a download for the phone to be infected, and security researchers speculated that people did so simply to stop the annoyance of repeated permission requests. A safer reaction would be to shut down Bluetooth, or move out of range of the infected device.