Summary
This quote highlights the contrasting approaches of different viruses. An inefficient virus is one that is too deadly for its host, quickly leading to the host's death. In contrast, a clever virus is characterized by being more successful, as it finds ways to remain within the host without immediately causing its demise. This quote emphasizes the evolutionary strategy of certain viruses to strike a balance between replication and the longevity of the host, allowing them to propagate and maximize their chances of survival.