There is no affirmation of life without: “Possible contamination must be assumed, because it is also opening or chance, our chance. Without contamination we would have no opening or chance”. (Jacques Derrida)
What opens up (individuals, relationships, social systems etc…) is the propensity to contamination that unlike its biological counterpart destroys matter (limits, inhibitions etc…) by giving more life, not less. A virus yes, but a vital virus.