A British scientist says he is the first man in the world to become infected with a computer virus.
Dr Mark Gasson from the University of Reading had a chip inserted in his hand which was then infected with a virus.
The device, which enables him to pass through security doors and activate his mobile phone, is a sophisticated version of ID chips used to tag pets.
In trials, Dr Gasson showed that the chip was able to pass on the computer virus to external control systems.
If other implanted chips had then connected to the system they too would have been corrupted, he said.
teach me for not spending much time in the chill out room