“Antibodies,” says Lydia urgently. “Otto, don’t you understand? You develop antibodies to microbes, you can even inherit some natural resistances, but if–if a strain of smallpox attacked you, you’d be helpless, because you’ve never encountered it. And advertising works exactly the same way!” She grabs his arm. “You’re young, and you’ve got no immunity. There are no vaccinations for this, you’ve got to fight–Otto, please tell me you can hear me?”
But Otto is oblivious, heedless and helpless. “Sure,” he grins cheerfully, “no problem,” even as he attempts, via blender and funnel, to get a tiger into his tank.