Photos: Inside the antivirus control centre

What does this button do? Inside the vault, Jarno Niemelä, senior antivirus researcher, launches versions of Cabir on Nokia handsets, in the hope that other people won't make the same mistake by understanding these rarely seen viruses more closely and observing them spread.

As one phone becomes infected via bluetooth, the others chirp into action, one-by-one, announcing that they too have become infected in a viral 'domino effect'.