In Virus Björk narra la fatale relazione tra un virus e una cellula, così come spiegato dalla stessa artista: "Si tratta di una sorta di storia d'amore tra un virus e una cellula. E naturalmente il virus ama la cellula così tanto che la distrugge".
Like a virus needs a body
As soft tissue feeds on blood
Some day I'll find you, the urge is here
Like a mushroom on a tree trunk
As the protein transmutates
I knock on your skin, and I am in
The perfect match, you and me
I adapt, contagious
You open up, say welcome
Like a flame that seeks explosives
As gunpowder needs a war
I feast inside you, my host is you
The perfect match, you and I
You fail to resist
My crystalline charm
Like a virus, patient hunter
I'm waiting for you, I'm starving for you
My sweet adversary
My sweet adversary
My sweet adversary