The third song to be revealed from Bjork's fascinating and ever expanding Biophilia project has appeared over the weekend and has been getting quite a lot of love. Whereas Crystalline divided a lot of fans at first, Virus seems to be receiving almost unanimous approval, and it's not hard to tell why. The song is gorgeous. A twisted love story, from the perspective of a parasitic virus that loves the cell of its host tissue so much even though it knows its love can only end in destruction. The song features the bespoke Gameleste, with arrangements based on natural self replicating algorithms to reflect the spread of a virus, slowly taking over the song and over powering Manu Delago's gentle hang drum playing and Bjork's voice. Biophilia is shaping up to possibly be one of her best albums. The song and accompanying app, with interactive game, essay, animated lyrics and score, is released tomorrow.